AFAIK staples and Home Depot are in line to start selling retail models, in the USA at least, but they are tiny. like 8x8x4cm max prints. To me they are too dinky yet. I don't want to print off tiny wastes of plastic, I want something that can print useful things... more than a necklace charm or dog tags. Printing is only half the equation though. Unless you can do 3D design and get a workflow to turn that design into something printable, or can afford the fancy laser 3D scanners to model an existing piece from, you're stuck printing off the useless crap someone else designed.
So start learning the software, then go to staples and get them to print it off using their rent-able printer at a slightly inflated price. I'm also sure you can order every part you need to make one from dx.com very cheaply. PSU, steppers, nozzle, plastics, controllers, cabling.. Hell theres even a reprap that does 20x20x10cm for $540.http://www.dx.com/p/...mbly-kit-238922