BEWARE!: I think I just got another suspicious email
I just received another email that I don't like the looks of. This time it appears to be an email through Hipstamp that says My offer on a "US 1866 Scott # 77 Used" has been declined. Of course, I've made no such offer on a stamp like this. The links in the email to the listing page do NOT point to a Hipstamp address, so I wouldn't recommend clicking on them.