In all honesty, I like the look of this car, & I wouldn't rule it out at this price (or near) because of the non original motor/box. Rust & body are much more price deflating items in my opinion. It would depend if you could live with it as is or whether it needs a heap of work to be roadworthy. Looks better than a lot of barn finds asking $10k upwards...
In one piece - tick
tagged XX7 - tick
windowless - tick
cool colour - tick... if original
just my observations

cheers
Max