I just traded an unwanted mod for a beta p3, but more for resale value to the fanboys.
Since you're so close to a few shops I would see if they know anyone looking to pay cash. If not and you're not gonna use it, figure it as you're selling the p3 for 130$ which really isn't bad compared to your asking price.
70$ worth of mod plus 60$ cash. Hell I would do it
or try for 80$ cash if you get the update. Then you're sitting at your asking price.
Ended up with $80 in cash and an IPv4 only used once (It still has the plastic on the screen) in trade for my provari p3, a button top 18650 and 18350. Not a bad deal