In the D/FW area most of the Asian Grocery stores will have Wild Caught Texas Shrimp for sale most of the time for about $6.99 per lb, make sure you get the wild and not farm raised.
Night and day difference in taste as well.
I dont trust those places at all.
I have been shopping at them for years, I get some of the best tasting shrimp from there. I can't eat what is farm raised now of days, taste too bland and dull. Only similar shrimp I have found is at market street and it is double the price of Asian Stores.
They have a pretty good selection of fish as well, they even sell black bass. Overall the quality is very good and the price is very competitive. There vegetable sections are fairly impressive as well.