Safe to buy replacement battery off ebay?

[Broohaha]

The battery on my thinkpad x60 seems to have died. The computer runs when the ac adapter is plugged in but when I take the plug out, it turns off, even with the battery in there. Doesnt seem like the battery is carrying a charge anymore. I bought it used about a month ago and I guess the battery ran out of juice.

I called IBM and while my laptop is still under warranty, apparently the battery fell out of warranty about three weeks ago...

I see that there are plenty available on ebay. Some are much more expensive than others though. I imagine the more expensive ones are authentic IBM-branded ones while the less expensive ones are knockoffs/OEM items manufactured by third parties in East Asia.

http://search.ebay.com/thinkpad-battery ... ZlQQsojsZ1

Will a $45 OEM battery will do the trick? Or will it not hold the charge as well and/or die out quicker?

Can anybody suggest the best place to buy a replacement battery? Obviously, price is of the essence so I'd like it as cheap as possible but I also dont want something that will die in 1 month.

Just a note: I checked to see if my battery was effected by the recall and unfortunately it was not.

Moderator edit: Locked; duplicate thread.