I agree with JubJub. If you want to hack it and really take advantage of it, go for 1000 or 2000. Otherwise, 3000 is the way to go because it's the nicest model. But there's not a big gap between 2000 and 3000, just a slightly
better shape and screen really. No great difference.
So yeah, I'd recommend 2000.
Good games? Oh god there are loads!
Based upon ratings, sales and general fanbase, these are some of the best games on PSP:https://www.youtube.com/watch?v=amnXu7MmW2s
Not including Littlebigplanet or Peace Walker coz it's an old vid.
And err there may be offers on AMAZON.co.uk
Also try play.com
Just explore the net and look for offers if any.