[bike] found something on craigslist, does it look like a good option?

[kj]

I guess it depends what you would call "very common". There are a lot of pics on the web, but when I broke my frame, every person who passed me stopped to look because they hadn't ever seen it happen. I'm also not sure most breaks happen due to metal fatigue, unless that includes munging frames off 6' dropoffs. Mine happened over a rocky section of trail that utilized all available travel on my shocks. I guess that's sort of fatigue, but not really. I agree aluminum isn't as durable, but it's certainly a viable material for bike frames. It depends what you value. kj.