It's well-worth the price given the post history. It has untrusted green feedback from a respected member (green Hero). No signed message, I simply haven't posted any address the last year as I thought I'd keep the account.
I'll remove the "at least"
ISn't there one posted before that? The older the better. 0.5 seems to be the going price for such accounts but most people will require a signed address or it will go for significantly less because it could be hacked etcx.