So the trade offer that you are getting is very good. People are selling these used on eBay and marketplace for a similar price, and that can be a hassle to deal with compared to the trade-in program at Apple.
Your system should be running better tho, I would factory reset and don’t even restore from a backup (there may be some program that is causing issues). Also very importantly, it could be overheating. I would suggest removing the backplate and checking the fans for dust, etc.
So the trade offer that you are getting is very good. People are selling these used on eBay and marketplace for a similar price, and that can be a hassle to deal with compared to the trade-in program at Apple.
Your system should be running better tho, I would factory reset and don’t even restore from a backup (there may be some program that is causing issues). Also very importantly, it could be overheating. I would suggest removing the backplate and checking the fans for dust, etc.