If you sell cards on eBay how do you decide between auction or fixed price?

[T206Collector]

I just sold off about 300 T206 cards in 20 card bursts over the past week or two on ebay. I did almost every one as a 1-day auction with a .99 cent starting price. The amount of attention was more than sufficient. I did pretty well. I do think I may have done slightly better with the 3-day auction format.

I don't like going more than 3 days because people forget about listings. They get the email in the morning that there is a listing. They check it out and realize it ends in a few hours, and they get to thinking. I like to find the buyers and keep them interested in bidding on the same day.

I often do better with the auction format than I was even asking for in the BIN format. E.g., a $200 BIN that doesn't sell will sometimes sell for $225 or $250. I think BINs get ignored, even if they're reasonable.

Edited to note: This works for T206s because there are SO many collectors. If you're talking about a rare item, you may take a different approach.