PCLN has the least number of monthly unique visitors among the three. Local Corp has 28M, TripAdvisor has 21M while PCLN has only 15M. The reason of PCLN share price at this level is only due to the artificial support from institutions who has total control of the shares. In short term, they can move the price to any level. In long term, however, the share price is not going to end well.
Again, do not short in near term. Definitely not buy.
Local Corp has additional to the near 28 million Monthly Unique Visitors from the flagshiptesite more tnan 12 million from it's network. That are togethger 40 million or near the 2.6-fold US-Monthly Unique Visitors of Priceline's Monthly Unique Visitors.