Beware of idiots
That is a steal. I would call them back and tell them you changed your mind.I think it was around 1700 bucks - probably a steal, which is why I'm likely to regret not jumping on that one.
The subsidized transmissions that Ford sold in the wake of the tech pack fiasco were $2500. Look at the retail price of a new one from any supplier.
I have one. It sucks its taking up space, but I don't regret the purchase. I might even buy an engine block while I could as well.