He is a scammer.  My brother was trying to sell a trailer for $500.  This guy sends $2500 check, expecting my brother to send the difference to the mover.  Luckily the bank held the check 7 business days for verification.  He just talked to the bank and they told him it was a fraudulent check.

How did the transaction go?

I'm trying to sell an item on Craigslist and this number texted me to purchase.  Questioning the validity of the purchase.