BEWARE: It's a SCAM!
The email I received after I replied to a post on Craigslist seemed suspicious so I did some research. This is the email I was sent:
"Hello Someone just bought this from me, but I can tell you where I got it from. I just got 4 of these from here cactusauction.com and I resold them for some extra money. The trick is to watch for bidding to slow down and then jump in. That's what I do and I win all the time.
All the best
Diana
Sent from my iPhone"