I built my first 3D printer a Reprap Mendel i2. Not an easy task to setup, a lot of fiddling with it and it broke down within a few months. So I ordered a much stable machine to replace my faulty unit.
This printer is just the best one out there, I has almost everything needed in a printer. I am talking about the heated bed, the all metal extruder that works like a charm with any kind of plastic filament. Good and Bright LCD screen, SD card support and the free 2 kg filament and all that for just $340. You must be crazy to not go for this machine.
I am sure if you procure the parts used in the printer individually from eBay, you would be spending more than $500.
My Final suggestion would be don't think again and especially not the negative reviews here, if you know how a 3d printer works this is the best printer ever.
This is not like a regular printer were you click print and it’s printed and the paper rarely jams.
Meaning, it's a hobby and will require a lot of time and technique to get good prints and will require constant repair due to the nature of the machine.
The printer takes a long time to assemble and hence it spoils the excitement a bit, the printer manual is not up to the mark which does not help at all.
The Heated bed and the all metal Extruder us a great addition to the printer and the freebies are awesome. I really wish they could make the assembly thing easier to work with.