The seller's asking price.  A nice production cel 
like that one MUST go for at least $100 (probably 
closer to $150 or above).

The absence of sequence numbers is also something 
to worry about.

You could also e-mail me if you want to tell me 
how to find the specific seller (and maybe where 
that particular cel is posted).  Don't worry, I 
won't jeopardize your potential purchase in any 
way.  I'll just let you know how reliable the 
seller is, if I happen to know him/her.  (I was 
the Human Keep-Track system through December, so 
I know my cel dealer sites.)