Titanium Frames; Warranty value

[RoadWhale]

I've been looking at purchasing a Lynskey frame on eBay that is warrantied by the Lynskey factory for life. However, there is a Serotta Legend that has re-appeared in the Classifieds section of Paceline that may be a really good fit for my long torso body.
Obviously the Legend will not have a warranty but, once used for a few thousand miles, would it most likely have already failed if there was a flaw in the frame? Has anyone had a titanium frame that developed a stress crack only after many miles of riding?
The Lynskey seems like a good value although I don't feel any emotion when considering their frames. I'm considering them because of the low price point and warranty. When I look at the Legend, it reminds me of when my Father handed me his Rolex and said "it's yours now"