The lowest purchase/sale on a public exchange was for 0.003/BTC, it's mentioned in a recent thread here, by the seller who has no regrets.
Yep, I traded at that price. I believe it's the lowest.
thats an interesting looking client you have there Theymos. so far you're the a co winner at .003.
i don't feel sorry for you b/c i know you have a ton stashed elsewhere!