70 dart 4-speed 340

Hey guys, first post!
I'm looking to buy this car in my area and wanted to get a few opinions on it. Owner claims it's super rare but needs a bit of work. A 340 dart restored, same color but auto sold in my area for $35900. I believe the price may be high but you guys judge. Any info would be great.

Numbers Matching H-code 340 4-speed Dart Swinger - cars & trucks -...

Seems pretty high to me for having to do that much rust repair, especially rail replacement. There is a fellow on A-body Mopar and has a thread in fabo restoration section, doing a full on resto on a 70 Swinger, he can give you an idea if it’s worth the buy in. His name is Randy Hight, I sold him a bunch of parts when i was living in Edmonton. I picked up a rusty 69 340 4-speed Swinger for 300 bucks a few years ago on a whim, rusty and stripped but has a fender tag. I’m wondering what it’s worth now.