Bad things about what? The cameras or Ebuyer?
To find out about the cameras, search on Google for the camera model plus the word "review" to get details of them.
As for Ebuyer, like any store, you'll only generally hear about the bad experiences they had - people are very quick to post reviews saying how bad the delivery was, 5 items they ordered were damaged etc etc but the good reviews go nowhere! As for me, I've order �5000+ from Ebuyer for myself and other people and have had two, maybe three items that have had to be returned each of which was refunded or replaced with no hassle withing 36 hours. I'd say that's pretty good! :)