I have a 2008 Black MacBook 4,1 (2.4 GHz Core 2 Duo, 2 GB of RAM) in great condition running OS X 10.5.8 (Leopard). The exterior is literally in great condition with minimal wear even on the trackpad. I typically use it closed and in the vertical position using a TwelveSouth BookArc so it has seen minimal wear-and-tear. The only issue I've had with it so far is the battery swelled and no longer held a charge. So, a year ago I replaced it with an upgraded battery from OWC. I'm at a cross-roads with my MacBook: A) Buy a new 13" MacBook Air and sell my '08 Blackbook. Resale values on the '08 Blackbook are a miniscule ~$150 through BestBuy and Gazelle. B) Keep the BlackBook and upgrade it with a 120 GB SSD from OWC, 6 GB of RAM, and OS X Leopard. Cost is $250. Is it worth putting $250 into a 2008 black MacBook? I mainly use my computer for web surfing, occasional YouTube videos, Word/PowerPoint/Excel, and some light iPhoto work. The age is most noticeable when manipulating photos in iPhoto, opening large Excel spreadsheets, and opening multiple tabs in Google Chrome. On one hand, I hate to drop $1100 on a new computer and literally give this the BlackBook away for $150. On other other hand, I'm not sure if the upgrades will really prolong its usefulness or not?