Good stuff in good condition is still selling.

I see prices for top end componentry still being fairly strong for campagnolo, huret, simplex, TA, and suntour cyclone/superbe. Buying complete or incomplete bikes locally and then marketing internationally is still the best method for returns. I am getting a lot lazier when I see a decent deal but factor in travel time. That being said I did travel 3 hours a couple weeks ago to see a real rust bucket.

I don't really bother with midrange or lower gear anymore as the margins aren't there and I don't have enough time to clean and market them.

The worst moneywise I did for Ebay was the first week of January when I wanted to test out unfixed bid only prices. Apparently after spending all their money on Christmas most people were still in budget recovery mode come early January.