Because its been on Craigslist for awhile and people kept offering 70, I said no to them. Now I just want to sell it and I thought oh why not see if I can sell it for bitcoin.
So the btc price is lower because the audience on btc forums is lower. Also I would be willing to sacrifice price on bitcointalk in order to start creating a reputation.
And I don't want the people to win that offered me 70 for something that's already a ridiculously good deal at 90.
And it would be interesting to meet people in the btc world in person.