Before I buy a printer, I check whether compatible cartridges are available, the cost of full set and user reviews.
For example, the price of compatibles vary 2 to 3 times the price between one printer and another, even for the same brand. It's similar for 'compatibility' also. For example, Canon inkjet printers rarely give me an issue with compatible ink, where as a few Epsons keep complaining about using non-genuine ink and often give poor quality prints or "unrecognised cartridge" errors. Then again, using genuine cartridges does not always mean perfect prints either, as a Kodak printer we previous used often had clogged heads despite using its official cartridges.
I'm also sure Samsung would need to do more than just low printer prices to get sales. I still remember when Dell had Â£9 printers until customers got smart by buying a new printer each time it ran out of ink instead of paying the Â£26 (if I recall right) for a replacement set.