A few hundred, but that's no more than I spend on games for most consoles. And sadly, I've got a lot more enjoyment from some 99c app store games than I have from some $60 Xbox games (Assassin's Creed 1, I'm looking at YOU...)
How could you not love AC1!? After playing both AC1 and AC2, I've got to say I still love AC1 more. But I agree on that point, 99c sure buys a lot of entertainment these days. And I've spent something in the upwards of $300? Almost ashamed of it, have to curb spending. :S