That sounds like a headache to me. I really just wanted it out of the house. The power cord only works if you hold your mouth just right. It was barely functional (slower than Christmas) and I don’t want to deal with anyone believing I mislead them about what state of a computer they were buying.
You can probably still buy new power adapters for them. (My MacBook Pro is a 2007 model and I think it was last year that I bought a new power adapter and battery for it. Or maybe it was earlier this year.)
And, usually, people buying older models know what they are buying so they know it won't be as fast as a new machine. And, sometimes, they might just be buying it for parts to repair their own machine. The original screen on mine broke and the only way I could get a replacement was to buy a parts machine on eBay. Found one with no hard drive and used the screen from it to replace mine.
I’ve sold stuff on EBay, but shy away from doing anything there electronic.
I can understand that. Too many horror stories. But worth noting for those willing that you can usually get more money selling a used Mac on eBay than what Apple will give you for it.
Also, for future searchers, don't underestimate (or overestimate, for that matter) the collectors market for older machines. Ones from the 90s and earlier are "hot" now but in probably a couple years or so, ones from the 2000s are going to be of interest, especially if there is scarcity due to people sending them back to Apple for recycling.