I made this mobile last year as part of my master's degree course, and I'm charging UK£40 plus the cost of postage for it (payable by cheque). My tutor said to charge £300 since it's a one-off original piece of artwork, but I really just want it to find a good home. It hangs about 5 feet long and is made of foamboard and wooden dowels. It would be perfect for someone with a high ceiling, a tall stairwell, or a school or library that can hang it where it won't be in easy reach of children. ...Any takers?