I am looking at buying a Digital SLR and will probably stay with Canon because I have lenses from my film Canon Rebel that I want to use, but I don't know if I should go with the Canon Digital Rebel or step up to the 10D.

What are the main differences between the two and do you consider any of them significant?

Also, has anyone ever bought this type of camera on EBAY and if so, what was your experience.