eBay BIN's

So, I usually sell my cards as auctions with the starting price being what I’d want for the cards at the very least. I’ve had some decent success with it and I only did it because eBay had special offers recently that reduces the provisions of auctions to 1€ max instead of the normal 10%. Since the offer isn’t there anymore, I’m contemplating switching to BIN’s. I’m assuming everyone is selling their cards at a BIN that’s higher than the actual average sale price? How much higher do you set the BIN at? And how well do you do with it? Have you had any interesting observations in the regards to Auctions VS BIN’s? How long do you usually sit on a decently popular card?

Basically, I’m interested in your experience. I know we had a similar topic recently, but it didn’t go into depth as much.