Almost 100% of the stuff I sell on eBay is Buy it Now with the Best Offer option. And even though they can submit an offer, a number of people go ahead and hit the BIN.
I had setup all of my listings to automatically accept a certain offer amount and to send me an e-mail if an offer was below the automatic figure but still above a minimum. I did this just to avoid having to deal with the lowballers. But eBay sales got so bad about a month ago I decided to remove the min/max requirement on any new listings and just go with the straight Best Offer option.
The bad part of that of course Is I now have to deal with the lowball bids. But I'd rather do that than give stuff away in auctions. I've been burned too many times on auctions with both raw and slabbed books. I'll run an occasional auction but it's only for a hot book or it has a reserve tied to it.
Another thing you can do with BIN items in your store is run sales. I'm almost always running some kind of a sale. You can run a sale for up to 45 days and you pick the percentage off you want. And you can run multiple sales at one time. I'll usually do one sale for slabs at 10% off, another sale for all comics under $10.00 and a 3rd sale for comics over $10.00. Plus you can pick and choose which items are included in your sale.
I agree, BIN with best off is my preferred ebay strategy. Sales have been almost non-existent on eBay over the past month or so. Sales here have been slow as well. I always get people "watching" the items, but it takes a while for them to sell. I would rather wait and not give the comics away with auctions.