Same thing happened to me. Says I can ship the dress when cash is in hand. They are apparently sending me $775 more than what the price was for the dress. The check will be here Monday but will not be cashing it now that I see that I'm not the only one they are doing this to.
This person also contacted me on Craigslist to have me send an item with a cashier's check. Item was only 700 and they sent me a 2000 check. Do not sell to this person.