have a word with the seller asking why he's used your pics without permission
if it gets all arsey then report them

if they turn around and say "sorry grovel grovel" then at least it's in writing and you can't dispute anything once it's on the internet


same thing happened to a mate of mine who found his car for sale on ebay, it was a pic of his car from his website that the guy had just used
a few quiet words saw the offending picture get a great big "this is not my car but a library picture" emblazoned across the front