I have purchased quite a lot of camera gear from Japanese ebay sellers, and I would say 99% of those purchases have been positive. But that is most likely because I am very thorough when checking the items for sale. First of all do not take statements like "near mint" or "mint" at face value. Look carefully at the pictures provided, if they are dark or if they don't show the item from all angles I will not buy the item. Check that there is no bleeding in LCD displays wherever they are, and check for excessive wear or dents that may indicate heavy use. Read the description carefully, many of these seller are not particularly well versed in the English language. The description should cover all important factors, if not I do not buy. Any hint of the presence of fungus, haze or scratches should be a big red warning flag. If there are inconsistencies in the description versus the known facts, likewise. Check the rating of the seller, it should be very close to 100%. Also make sure you can return the item or the presence of a money back guarantee.