Although I like Travelocity's fare-tracking abilities, it's frustrating when it offers a low fare for which no more seats are available whatsoever. For example, if I want to fly SJU-EIS on May 3rd, it shows a $79 R/T. Click on the fare, and I find that all dates for the fare are sold out, and then the fare expires. I have to click through the $99, $109, $119, $149, etc. - until I get to a $173 fare that actually has availability on ANY dates.

Not sure how to fix the problem without a lot of processing/searching on the server side, but at a minimum, you'd think it could suppress fares that were totally closed out and no longer available at all.