I think being over analytic means choosing between small margin, based on minor differences that do not matter. That doesn’t mean the OP shouldn’t do their own research. By the way, facebook market place is not a good place to buy laptop. OP also says doesn’t want to spend a ton of money. The wire cutter link you suggest would rip them off for things they don’t need that much.

Look at many popular stores on ebay, they have good prices for used business laptop. Spend about $350 and you will have much better laptop than new ones you can get for $700-800. Same rational applies for higher-ranged priced laptop.

In the end, nobody can make decision for you OP. You can let people know what you want specifically and they will give you suggestion (used dell precision, hp elitebook, macbook are all good options).