Mine was a game which, I think, intentionally took advantage of this trope, and did so quite successfully. It came out to absolutely zero fanfare whatsoever (I was working at a game store at the time), it was priced at $20 brand new, and has this simple little sky-blue cover with a town and a ball of...something...and a rainbow along with some a couple of blocky-looking Kanji on the front. I figured, hey, for twenty bucks, I'll give it a shot -- I could wait for it to come in used and save a whole two bucks, so I might as well get it now.
That game was the first Katamari Damacy. Quite possibly the best twenty bucks I have EVER spent; I put more time into that game than most $50-60 games that I have ever played (notable exception: the original XCOM). It was a brilliant game with a brilliant, yet subtle, marketing strategy -- "Put it out there for cheap, making minimal profit-per-unit, and see if people like it. If they do, make more games at a more financially sane price". Worth it even if it had been sixty bucks.