B/Os, as always, are meaningless. PC.net, once you have the correct link, suggests 2 most recently.

http://www.tf2pricecheck.net/Thread-PC-Searing-Plasma-Connoisseur-s-Cap

A 2.5 offer from a fellow lacking in both buds and keys and failed to collect them by the time he claimed he'd have them by, and further being an offer that falls into the current price range and has seen absolutely no competition even in the range of 2 buds, doesn't strike me as a reason to up it. I'll be voting no.

You have it in your backpack and as such, I'm disinclined to believe you.