I have a few of them. Certain ones are really quite valuable, mainly colour variants ,such as black vested Darth Mauls (at around $300) as opposed to brown the vested ones (at around $3).

I'm mainly intesested in some of the rarer "neo-classic" series figures

"Brian's Toys"have a list of all the Episode 1 figures ever produced inclusing variables. You should be able to price yours up there.

May the Force be with you. You should also (if you haven't already) check out the frontpage Star Wars competition. More Star Wars figures are on offer there!!!