Which path to take on tranny

I have a 904 tranny (used) I have no history of the tranny. I am also not a mechanic. As far as cost goes, would it be less expensive to have the used tranny rebuilt or just buy a new one??? example:

TCI Sizzler Transmissions
Automatic Transmission, Forward Shift Pattern, Automatic Valve Body, Mopar, Torqueflite A-904

$739.00

Thanks, John