$650 · Mazda truck mechanic special

I am selling my 2005 Mazda b3000 dual sport 3.0 V6 the engine is seized because the oil pump failed. The truck engine could be rebuilt or a used engine could be installed by someone who is a mechanic or knows how to do this. I am asking $650 but am open to all reasonable offers . These trucks are popular and are hard to come by because noone wants to part with them Other than the engine the truck is in good condition for the year.