We do not know the details of the case, but I think it is good to avoid generalizing. i have ordered a lot of used photo gear and equipment on ebay, with sellers in Europe and Japan, and I had only one issue, a Nikkor lens with fungus which was reimbursed no questions asked. On the other hand, I had problems with the one single item I tried to sell, with the buyer using some strange PayPal conflict procedure in order not to pay. Even though this was a disappointment, PayPal recommended not to send the item, and I simply did as instructed. For the anecdote, I eventually sold the item (a film scanner) on Amazon for a higher price!
Overall, I wouldn't hesitate to buy again from Ebay, if the seller has been around for some time, has good ratings, and specializes in photo gear.