Pretty sure PSP costed 250.
I thought it did too.
I'm not the type of guy who'd get a system for one or two games. Also of note is that I dislike playing series out of order if the plot of each game is heavily tied to an earlier one, so I'm not sure of metal gear solid 4. Also, I'm still not sure about uncharted, as I am not the biggest fan of most types of shooter gameplay and I find guns to be a boring type of weapons in games most of the time
Only thing I can recommend is Valkyria Chronicles but only if you like light strategy.