A 9-piece serially interlocking cube made by Michael Toulouzas...I'm selling these puzzles because I no longer have space to store or display them :(buyer is responsible for money transfer fees (ie 3.5% for paypal), packing and shipping expenses...

30 sticks assemble to make a regular dodecahedron.I'm selling these puzzles because I no longer have space to store or display them :(buyer is responsible for money transfer fees (ie 3.5% for paypal), packing and shipping expenses...

Karakuri Christmas Puzzle from 2007 by Shiro TajimaI'm selling these puzzles because I no longer have space to store or display them :(buyer is responsible for money transfer fees (ie 3.5% for paypal), packing and shipping expenses...

One of Stewart Coffin's best tray puzzles...It was used as an exchange puzzle for IPP27I'm selling these puzzles because I no longer have space to store or display them :(buyer is responsible for money transfer fees (ie 3.5% for paypal), packing and shipping expenses...

very nice 3-piece burr... level 8-4I'm selling these puzzles because I no longer have space to store or display them :(buyer is responsible for money transfer fees (ie 3.5% for paypal), packing and shipping expenses...

Jim Gooch's variation of the 3-piece burr. Entry in IPP22's design competitionI'm selling these puzzles because I no longer have space to store or display them :(buyer is responsible for money transfer fees (ie 3.5% for paypal), packing and shipping expenses...

This is a traditional Japanese-style puzzle box by Yoshiyuki Ninomiya. It was his 2010 Karakuri Creation Group Christmas present.

This is Akio Kamei's 2006 Karakuri Creation Group Christmas present. Difficult to solve.

An intricate and difficult trick lock by modern master Rainer Popp

This is Heartwood Creation's most difficult puzzle box. While this box has recently become available again, the new box does not have the same appearance.

From the official Cubic Dissection description: A participant of the 2010 IPP Design Competition, this devilish take apart puzzle is not for the faint hearted. It's extremely difficult to open, and even more difficult to fully understand. The mechanism is simple enough, but figuring out the exact principle is difficult. The goal is to simply open the egg and remove the "yolk" (in this case a US quarter coin). Individually manufactured by Robrecht in the EU, this puzzle is fairly heavy and ...

The object of the puzzle is to pack the four "fox" pieces on one side and the four "wolf" pieces on the other. Other objects include packing 1 fox and 3 wolves into a frame; or 3 foxes and 1 wolf into a frame.

This was Allan Boardman's exchange puzzle for IPP29. It is a tiny level-5 notchable 6-piece burr,designed by Bill Cutler. I have never attempted to disassemble it.I'm selling these puzzles because I no longer have space to store or display them :(buyer is responsible for money transfer fees (ie 3.5% for paypal), packing and shipping expenses...

Challenging packing puzzle w/ a unique solution.24 "podium" shaped pieces pack an 8x8x6 space...I'm selling these puzzles because I no longer have space to store or display them :(buyer is responsible for money transfer fees (ie 3.5% for paypal), packing and shipping expenses...

Each Crazy Tantrix puzzle contains ten hex tiles. The goal is to place the tiles such that there are single continuous loops of each color.The 3-d "Rock" has rotational faces, or you can remove the faces and start from scratch.I'm selling these puzzles because I no longer have space to store or display them :(buyer is responsible for money transfer fees (ie 3.5% for paypal), packing and shipping expenses...

this is a brand new Mysterians puzzle by Oskar van Deventer.I had bought two by mistake. It was Nick Baxter's exchange puzzle at IPP23 in ChicagoThis is actually an abstract 3-dimensional maze... quite tricky!I'm selling these puzzles because I no longer have space to store or display them :(buyer is responsible for money transfer fees (ie 3.5% for paypal), packing and shipping expenses...

this is one of the 2008 Karakuri Christmas Presents, by Tatsuo MiyamotoI'm selling these puzzles because I no longer have space to store or display them :(buyer is responsible for money transfer fees (ie 3.5% for paypal), packing and shipping expenses...

from puzzle world:A variation of Coffin's Pin Hole puzzle which uses six 1 x 1 x 3 block bars and six dowels, all three units long. All dowels are fastened to a bar except one. The Corner Block puzzle has a block added to each corner and fastened to one of the pieces. Very nicely made by Interlocking PuzzlesI'm selling these puzzles because I no longer have space to store or display them :(buyer is responsible for money transfer fees (ie 3.5% for paypal), packing and shipping expenses...

This is a set of 4 Six Board Burrs designs by Frans de Vreugd and Bill Cutler, produced for IPP22.They are Chocolate Dipped Burr, Irregular Board Burr, Tricolore, and Chequered Board Burr.These were the best designs picked from their complete analysis of the classic six-piece board burr.I'm selling these puzzles because I no longer have space to store or display them :(buyer is responsible for money transfer fees (ie 3.5% for paypal), packing and shipping expenses...

from cubicdissection.com:Stewart Coffin's design number 54. "This is a bizarre variation of Giant Steps (Design #10), same assembled shape, in which added blocks are attached differently...Very tricky to assemble. One made in 1976." I can vouch for the tricky to assemble part! Each piece is beveled on both ends, and the fit and finish of this puzzle is very pleasing. Signed and dated; 20 copies made for sale. I'm selling these puzzles because I no longer have space to s...