What to do?

Recently had an offer made to me in regaurds to a trade. My 71 Duster 340 and cash for his 69 383 4 speed roadrunner. Both are numbers matching cars his has been completely restored mine still requires paint -10 foot car-

I didn't have a chance to grab the fender tag info but by word of mouth it an AM/FM, tinted glass, power steering power brakes with front disc, 383, 4 speed, air grabber bench seat car, in dash tach

Car is about 98% stock and is the factory -can't remember the name- pale yellow. Paint is good has a few chips and scratches from beign a driver, under hood also very nice needs some detailing and wireing cleaned up. Underside is very clean all painted black. 4 speed is freshly rebuilt. Car comes with it's Magnum 500's

Both cars have professional appraisals on them.

I've always wanted a B-body but I am also attached to my Duster. What would you do?