Refence for different T60 models?

I have tried to search this forum for the past 30 minutes for any knowledge related to what I'm looking for, so please don't flame me for not searching if I didn't find it. My question is are there any simple references out there for different T60 models and what chipsets they use. I am trying to buy a new T60 on ebay, and I know that the higher the number the better for chipset (model 2613, 2623 > 2007, 2008, 2009). The newer chipsets allow you to access all ram and usually use a new processor. Is there a simple way on the lenovo site, or does anyone have a reference on the web (or even anywhere else?) that lets you just plug in a full seven digit model number in and spit out what the laptop has. I'm able to ask the computer illiterate on ebay to send me the model number and I can't take that and make a lot of sense from it. Dell was always very simple with its service codes, which could tell you exactly what the laptop originally came with, but lenovo doesn't seem to be as easy. Any help anyone can give me would be greatly appreciated.

 

And I'm an idiot, just found exactly what I wanted while poking around the sticky at the top.