Be careful buying on EBay. There is, for example, a "Gibson" banjo there right now. I put "Gibson" in quotes because it appears to be a fake, and a fake known to the seller and to E-Bay. This based on messages on Banjo-L, from VERY knowledgeable people, who have corresponded with the seller, advising him that it is not what is represented. Don't buy from E-Bay without safeguards, such as an independent expert's inspection and/or money deposited in an escrow service, with some reasonable period to inspect the merchandise and right of refusal before the money is turned over to the seller.
And don't expect to look to E-Bay to protect you from fraud, either. They have been (in this and other instances) informed of a fraudulent item and will do nothing about it, even though they have what they are pleased to call a fraud department.
Dave Oesterreich