I see this type of mentality of 'if I post my product cheaper than my competitors then I'll get the business!' taken to the extreme on some of the freelance job websites (peopleperhour,guru,fiver/etc) where people will have a page saying 'I can sculpt, retopo, UV, texture, rig, animate, and render a character for you for 10$ in 2 days, or an extra 20$ to make it 1 day. I'm sorry but that's just about literally impossible unless your character is extremely simple.
People who actually buy these lowest on the site prices will get lowest quality on the site, that's my assumption..Nobody's superhuman and artists shouldn't have to resort to this behaviour just to vie for a buyer's attention. Of course I'm sure some of these are actually scams, which is a whole other issue