Just my 2 cents, after reading this thread, I just called and took advantage of their pricematch to get something that marinedepot had a little cheaper. It took a few minutes but everything went fine. Im glad that Big Al's has representatives on the forum like this, if they didn't i probably wouldn't have bothered to call for the pricematch.
That said, most of the time you dont need to bother with the pricematch because Al's seems to generally have the best deals.
That said there were a few annoying caveats. My price match included the shipping cost from marinedepot, and i couldn't apply any coupon codes to the price-matched item. Still worth it because i got an Eheim 2213 for $30 less than the next best reputable dealer.