My daily driver is a mid-2009 Macbook pro. Bought new, it's had a HD and RAM upgrade (though still on spinning rust), a couple of HD internal cables that went intermittent, a new battery and a new external PSU. It probably really needs to be upgraded at some point, as it's now stuck on El Capitan and increasingly software doesn't support that. Chrome is the latest one I've spotted that has an issue with the old OS. Otherwise it's done very well for itself.