The D100 hasn't been made for awhile, so maybe you're talking about a used one. Here in the 'States, KEH.com has a very good reputation for selling used equipment. B&H in New York has a lot of fans here including myself. They don't have as much used equipment as KEH but there's a good chance that they would have one. I'd recommend getting at least a short warranty on it so you can make sure everything is right with it. Repairs will be expensive on any DSLR.