Hey guys, I apologize if this has been asked before, as I'm sure it has. I've been scouring the internet for the past week, but haven't been able to find any definitive results to my question, but this forum has given me a LOT of information. I would really appreciate some advice. I currently have a MacbookPro3,1 which is the late 2007 silver key model. I realize that the laptop is pretty dated, but hasn't really given me any problems so far. The HDD of 120GB definitely needs to be upgraded and I could do with the current 2GB's of RAM. Also, the battery is shot and barely holds a charge. Considering all of that, and the fact that it's not in the best cosmetic condition, I have a buyer who will purchase it for $550. In the case that I sell it, I would put in the difference to get either the new MBP 13", or a refurb 15". Now I'm contemplating either getting a new MBP 13" and selling this one instead of upgrading the battery, RAM and HDD because I find that the price difference is minimal if I take into account the price difference to get a new one after I sell my current laptop. Which would be a better option? More than anything, I'm worried I'm not going to be able to get as much as I can right now out of it (in terms of resale value) and won't be able to afford a new laptop if I don't do it right now. I'm also worried that the C2Duo that it's running on is a little dated, and that Apple will soon stop supporting it too much. I'm already on edge about purchasing a $130 battery for it with mostly 1-star reviews! Should I just get the new 13" or stick to this one and spend almost the same amount as I would on the new laptop upgrading the RAM/battery/HDD? I would appreciate any opinions, and apologize again for the repeat post (because I'm sure somewhere in this forum is lurking the exact same question just waiting to be linked in this thread ) and the tl:dr length of this post! Thanks!