@Cal Ewing
I cant say if you are wasting your time but if you have been seriously attending with the intent and means to purchase for 3 months and have yet to buy anything it may be time to adjust something.
Reasons why you may not be buying:
1) Target property was pulled from the auction
This happens to the majority of good properties, sometimes as late as 10 minutes before the auction starts. The auction I attended this month had two properties that were still on the list when I left my house but were pulled by the time the auction started.
2) You are bidding but always out bid
You need to evaluate how you are determining you max bid
a) right comps for ARV
b) accurate repair estimates
c) ROI expectations
In other words how are you pricing the deal. This is not really any different from any other REI source but it is very important to get right due to the limited information and time sensitivities of buying at the auction.
I have to say while we regularly buy in multiple counties (4 this month), Harris seems to be especially competitive as are Dallas, Tarrant, Travis and Bexar. But that is why our investors let us do the hard work and then buy from us.