In November of '08 I bought a loaded, maxed out $3k CTO 15" MBP (2.8 GHz C2D). Loved it to death. After two years Apple replaced it for free with a better (albeit not top of the line) mid-2010 2.66 GHz i7 Arrandale machine, which I am still on now. Don't know why, but I've never really loved this machine like I did the C2D machine, not sure why. But it has treated me well and needed no repairs. Last summer I threw in a 120 gb Crucial SSD and maxed the RAM at 8 gigs to extend the life of it. Now with 800 cycles and 75% battery health, it's telling me to service the battery. It only lasts maybe 2 hours just browsing, so it's time to replace it, even though a visual inspection of the battery shows no signs of swelling, etc. The machine still does what I need it to do so a battery might buy me 2-3 more years, but is it worth shelling out another $120 for a new battery or should I just sell it and buy a new machine? Not sure what it's worth, but it's flawless except one faint scratch on the bottom. FWIW I bought my wife a loaded CTO 13" rMBP for Christmas, so that would be two huge computer expenses in a short time, which admittedly is a deterrent, though affordable. Gazelle pegs the value at $411-$461 depending on if they would consider it good or flawless, but not sure how battery condition or upgraded RAM/SSD factor in.