dpreview is a really good site.
my budget was 400 $, and i needed a high optical zoom at least 3 mpi camera. i searched all (seeing the models first at jandr.com) that had the charachters i needed, and ended up with one that cost 100 $ more but was what i needed. (well at least saved the tax ordering online..)
i would go for something that is 1,5-2 mpi. don't get the minolta dimage small model, it's image quality isn't very sharp.
jandr.com has like 120 digicam models, the cheapest starting like in 50 $ or less. see some of the models, and just hope to find someone that has any of those models around.. 🙂