What would you pay for a slant six?

Side note. It's a '64 225 slant six out of a little old lady's dart. I have the receipt of the rebuild and yes it is 15k miles on the motor and transmission. Automatic 904. It has all of the '71 components like oil pan ect on it for my 1971 dart car. I am driving it right now. Drove it today and it runs like a champ. Anyways scrap metal or not, I'll make some money off of it.. Also it seem like there is a lot of interest in my intake and headers for the engine so I'll at least walk away with $500-700. Not really worried about it, just want it to go to a good home and a good car if I can help it. I'll be just as happy scrapping it for $100 at my local crap metal yard....lol