One option I have considered is a kit from sainsmart. IIRC they are out of hong kong possibly mainland china.
Free shipping to USA and Australia.
Looks like the same electronics that one would find in a plastic scribbler for about $250. yes still need to build the frame buy belts pulleys guide rod linear bearings etc. power supply etc. but an option. These guys have lots options from a single board to an entire electrons package.
Ramps 1.4 Mega 2560 3-d printer kit w steppers
IMHO a gecko drive is way overkill for a printer.
the ramps board has a place for 6 drivers keep in mind a 3-d printer board needs to control two heaters as well as 6 motors.
Just the controller a mega 2560 ramps 1.4 and 5 plug in drivers will run about $60.
Ramps contoler kit
My main hesitation of buying such a kit besides the time to engineer and assemble is the cost of all the extra parts. Most the complete kits I have seen are not impressive and more money than a solid doodle.