A500's are cheap at the moment. I got 5 that i got of ebay, before i realised that an A1200 is a lot more flexible etc.
A1200's fecth a lot more, especially in places like Aus,
ANd A3000's and A4000's can fetch a lot of $$$. I would love to buy an A4000, but the price is hard to justify (though i've nearly spent as much on the A1200's lol)