As a seller, do you usually respond to a Best Offer (if you use BIN) with a counter offer?
I always do unless the offer is way too low (got offered £9 for something I have listed as BIN £42 recently...).
But as a buyer I offered £6.50 for a skirt on BIN as £8 and the seller just declined without a counter offer. Stupid really as it annoyed me and I'm now not going to offer more. This was day 8 of a 10 day listing by the way.