Trek Mountain Bike Craigslist

either of these two treks?
would either of these two trek mountain bikes be a good buy??
http://charlotte.craigslist.org/bik/1029467342.html
http://charlotte.craigslist.org/bik/1008250173.html
I am 5′ 4″ 120 lb. I cant afford a new name brand mtb and I am not buying a department store pos. please tell me if either of these are good.
I will be using it for xc and some pretty heavy trails.
I don’t like the first one because it has 24 inch wheels. When you see so many bike manufacturers rolling out various models with 29 inch wheels, and you hear the guys who have them rave about how it smooths the trail out, I think 24 inch wheels are going to suck. I ride with 26 inch wheels myself. With 24 and 29 you have a limited tire selection.
The other bike may be too large for you. The seller lists it at 17m, but mountain bikes aren’t measured in millimeters ~ they’re measured in inches. 17 inches is the distance between the center of the cranks and the top of the frame’s seat tube. This measurement is important when considering whether you will be able to stand over the bike or not. Another thing to be aware of is that the longer the seat tube is, the longer the top tube is. In short, if you get a bike too tall for you, chances are the reach to the handlebars is going to be too far for you as well.
I suggest that you go to a bike shop and ask what size bike you should be riding. They should have you throw a leg over a couple of bikes to see how you look on it. Once you have the proper size figured out, then start shopping Craig’s list for bikes that size. No compromising! Proper fit on your bike is THE most important thing.
Great Boy’s Trek Mountain Bike!

