New/unopened. Comes with certificate of authenticity. Limited Edition. Puzzle number 8 out of 10. https://dmpuzzles.com/ Description per website:Aim: slide the red block from the bottom to the top. Easy...until you realise that the labyrinth within changes with every twist and turn you make. It is harder than it first appears. Difficulty: 8/10

The Castle by PrintedTech. Purchased from Etsy and never solved. Description from Etsy below:This sequential discovery puzzle box has about 15 steps for the solution and is themed as a castle. Using unique puzzle mechanisms and homemade design allows for a unique and enjoyable solving experience. For those experienced with puzzles, this puzzle would take about 35-45 minutes to solve. A full solution guide won't be provided unless requested. The rules for the puzzle are as follows:-No banging or...

The great Juno's design and exchange puzzle from IPP29, held in San Francisco in 2009.  Complete in original box with solution.

This was purchased from Art of Play and is now sold out. The description of the puzzle from the site:Exquisitely crafted by Kagen and features a rotating steel maze that locks the lid. The Honeycomb box is very, very hard to open. The box has a larger than average interior chamber since the locking mechanism is contained almost entirely in the intricate designs of the steel discs.

From Pluredro.com:This is the most complex sequential discovery puzzle we have ever produced that also requires more solving steps than our former product, Slammed Car. The puzzle has six compartments and to reach the goal to access the last compartment, you have to open five boxes along the way. To make the goal of the puzzle clearer, we have put a kind of small charm, it has the shape of infinity, in the last compartment.Like many other sequential discovery puzzles designed by Juno, there us...

Fortress is a metal puzzle with an elegant and satisfying solution. This is a level 6 so not terribly difficult. It is still sold as new on several sites. Please review pricing before over paying for this puzzle! These are fun entry level puzzles and also make great gifts! Comes in almost new condition with original packaging! Starts at $1

Quad-L is a metal puzzle with an elegant and satisfying solution. This is a level 6 so not terribly difficult. It is still sold as new on several sites. Please review pricing before over paying for this puzzle! These are fun entry level puzzles and also make great gifts! Comes in almost new condition with original packaging! Starts at $1

Phantom is a metal puzzle with an elegant and satisfying solution. This is a level 6 so not terribly difficult. It is still sold as new on several sites. Please review pricing before over paying for this puzzle! These are fun entry level puzzles and also make great gifts! Comes in almost new condition with original packaging! Starts at $1

This puzzle has an intriguing internal maze so you need to get the ball from one end to the other, and back again! When you figure it out, you will smile! Puzzle still available so do not over bid! It is currently $70 USD for a new one!Description from PuzzleMaster:This well made hidden maze puzzle is made from Maple and Walnut wood with traces of iron and plexiglass.  Have fun as you try to get the ball from one end of the puzzle to the other end without going insane. This puzzle was first see...

The Power of the Ring is a disentanglement puzzle. Remove the metal ring from the bottle. This puzzle can still be found in some shops so please check pricing before over bidding! Comes with original packaging, solved once! 

A redesign of Stewart Coffin's #177-A "Five Woods," used by Bill as his exchange puzzle for IPP35 held in Ottawa Canada in 2015.  The object of the puzzle is to fit the five pieces (a tetromino, thee pentominoes, and an hexomino) into the tray.  The pieces fit in an unusual manner, and have some surprise solutions.I will provide a copy of the solution from the IPP35 exchange booklet to the winning bidder.

  Fire Plug Puzzle - classic heavy metal puzzle by Marcel Gillen!   Shipping calculated at end of auction and combined shipping is available.

Tricky indeed, Tricky Dick from Mr. Puzzle looks easy but removing the ring and putting it back again takes some doing.  Solved once, in new condition with packaging and solution.Shipping calculated at end of auction and combined shipping is available.

Wasserhahn by Roger.  This iconic puzzle is a perfect addition to any puzzle collection.Please see this link regarding mysterious puzzle designer Roger D: http://mechanical-puzzles.blogspot.com/2012/08/wasserhahn.htmlShipping calculated at end of auction and combined shipping is avaialble.

Escalating Box in perfect excellent condition with original pouch. Description from Cubicdissection: The idea for the Escalating Box came from a couple of different mechanisms I'd been fooling around with. I was going to release them as two fairly simple separate boxes but realized that I could put them both into one trickier box. I made a poll on our Facebook Group and everyone overwhelmingly voted for a single, more difficult box. Done and done! I got to the drawing board and realized ...

Sold out copy of Eric Fuller's Small Box One - Window Box.  Fun puzzle in perfect condition with original pouch. Description from Cubicdissection: Small Box One - "Window Box" is a devious drawer tucked into a box with lots going on for its size. The large hole in the box serves as a window into the mechanism...careful observation and experimenting is necessary to reveal its secrets. I'm very happy with how this box turned out, the mechanism works flawlessly and repeatably once you know ...

This is Tenchi by F. Boucher and crafted by Eric Fuller/Cubicdissection. It has been solved once, returned to original unsolved configuration, and placed back in original box. From Cubicdissection listing:"Tenchi is a brilliant anti-gravity packing puzzle named after a Japanese word that translates to both "Sky" and "Land," the goal is to pack the pieces into the frame so that the puzzle can be lifted and rotated without any part falling out.There are over four thousand possible assemblies, bu...

Bolted Closed puzzle by Puzzle Master produced by Bits and Pieces.  Fun puzzle that displays nicely calling to be taken off the shelf for a try.  Like new with packaging and solution.Shipping calculated at end of auction and combined shipping is available.  

Perennial puzzle exchange participant Wei-Hwa Huang's exchange puzzle from IPP26 held in Boston in 2006.  The object of the puzzle is to untangle the three rings.I will supply a copy of the solution from the IPP26 exchange booklet to the winning bidder.

  Rizal by Rex Rossano Perez.  This is where it all started!   Essential addition to any Rex Perez puzzle collection, excellent condition.  Fun solve with wonderful solution. Description from Cubicdissection: Rizal was Rex's first sequential discovery puzzle and is a great introduction to the genre. While not terribly difficult, it is tricky and has an elegant solution. Rex's output is very limited, and we're not sure we will get more once these are gone.   ...