My apologies if this is the wrong place for a question like this.

Back during the pandemic, I bought a 70s Peugeot U-08 that needed some work. Cosmetically, it was a little rough, but the frame was solid with no rust-out and all the parts were present. I did some maintenance, replaced all of the cables, and cleaned the bearings and greased them with Park Tool grease. The only downside now is the wheels. They're steel, and while they seem true enough to use, we all know about how steel wheels have trouble stopping in the rain. I was thinking about lacing a new set of maybe 700c alloys, but decided I wanted to focus less on French bikes and more on Schwinn and Raleigh. So, I put the bike up for sale on the marketplace.

Since then, it seems like I'm getting nickel and dimed half to death about it. I priced it pretty low and everyone's trying to make me go lower. The last offer I received was for $40. I was tempted to take it since $40 is $40 and the bike would be gone after that, but it irritated me a bit and got me to thinking. At the time I bought the bike, something was wrong with whatever rear derailleur it had, so I put a period-correct all-metal Simplex RD on it. Getting offered $40 for the bike made me think that I could probably get around $30 or even more for the Simplex RD by itself. That's kind of a maybe, but I've seen some other older RDs on eBay and other places fetch similar money.

So, in a case like this, is it better just to practically give the bike away, or should I try and part it out and see if I get better results that way?