My $.02 pertaining to the BST is that this Forum and it's members are a community. We should look out for each other, not take advantage. Yes, there are squabbles and I'm sure some people don't care for others, but to me it would be a big douchebag move to dredge up an old post from more than 6 months past and try and get something at a price that is not truly reflective of current market conditions, and be unwilling to negotiate.
I just wouldn't do it and if someone did it to me, I'd probably honor it within reason; but I'd never do business with them again, and likely would do a public outing in a way that others know to go back and review and update all old posts from the past so that you too don't get burned.
You have one reputation and are you really willing to risk it over saving some money?
Great topic and now I'm searching all my old posts where the card I had up didn't sell
Bill