low grade consumers inkjet has 2 steppers, motors, plethora of big/small components mechanism, nanoscale ink "extruder", a robust smps and an fpga and cost $50 only
1. steppers are typically only used in the scan head these days, a tiny flat geared one, all the other motors in typical inkjets these days are standard DC motors with an optical encoder strip/disk
2. consumer printers are manufactured in massive quantities, with volume comes savings
3. consumer printers are loss-leaders for ink sales, likely sold below manufacturing cost, this has been known for a long long time (and some 3d printers are trying to do the same now)
As for this Tiko printer. The price is cheap but I do think it should be possible to sell a 3d printer that gives reasonable results profitably for $200 US or less (certainly that's the point at which I would buy one), but only if in a relatively large scale production. However I don't think that THESE guys can do it, and I don't think that THIS printer is going to give good results, it's conceivable that they are doing some seriously nifty stuff to get good results out of very mediocre components (those steppers
) but... extraordinary claims and all that.