Everyone, I want to warn everyone about an eBay seller who I believe to be dishonest. The merchant name is amana2000. I made a BIN purchase of a 50 Summicron DR from him for a premium price because it had the box and was described as having "perfect glass". The lens arrived with significant internal fogging, and a major internal scratch.
I emailed the seller and was offered a full refund including shipping, which seemed very reasonable - I thought he made an honest mistake and so I agreed that I wouldn't leave negative feedback. After I returned the lens, the seller refused to refund my money, accused me of buyer's remorse, and offered me $300 (I paid $1800 - I know it's a lot, but for a perfect collector-condition lens, I was willing to pay the premium).
I have taken it up with my credit card company. I don't expect I will lose any money except my return shipping, but I would deal cautiously with this seller. His evaluations are not accurate and he did not keep his word with me or behave honorably when there was a problem.
It's curious because he has a lot of positive feedback and has sold a lot of gear. I went out of my way to be exceedingly polite in my interactions and even thanked him in my "dispute" (not "claim"!!!) description for being so reasonable and responsive. Then things went bad.
Two other lenses I purchased from another seller (one of which is discussed in this thread) arrived with fungus, haze, and separation inside of pristine lens bodies. This seller has also agreed to full refunds, hopefully he will keep his word.
Happy bidding!