Yeah, if I had the spare cash, I'd be an impulsive buyer - much like I am with web development stuff. I mean, some games, like say: Super Mario Galaxy, have such a good image around them - as well as being particular to my tastes, that I just can't resist buying on the spot; I wouldn't want to wait for the price to go down or for it to be used.
Anyway, I might do the same for a riskier game (Iv'e done similar many times for web development things.) - and that could be a problem if low on cash. I mean, why waste rent money on a bunch of risky games? However, though, this scenario hasn't come up because I'm still in the process of getting a new console and TV.