OWC looks like a decent option. I have never used them but their site lists the battery, tools and video for $84…I've had to answer the same question for my MBP6,2 and decided that for me, the cost of the new battery was not worth it. I think this decision is going to be different for each individual. As 5T33ZO stated, there are a lot of battery "scammers" that will sell you a cheap battery. I first tried a cheap battery from Amazon and ended up returning it for a refund after the battery did not hold a charge.