I doubt most yard sale shoppers are going to buy some beat up film print from 100 years ago and then go look it up on IMDB. At least none of the yard jumpers I've known.

There are thousands of bogus reviews there so getting any of them deleted would be hard. You could always report it and see what happens. Sometimes pointless "reports" are just tossed to the side and the review gets thrown out but there's just something about this that strikes me as dirty.