I hear ya, I'm in a similar situation but I live in NH so I don't have sales tax, but I also don't have a local dealer for Pro Comp tires so I'd have to order em online.
I like the DuraTracs a lot but I cannot find a local dealer who will sell them for less than $200 a tire which is absolute insanity IMO when talking about 31x10.50x15" tires. I've never come even close to paying that much for a 31" tire and I'm not about to start now.
I can get the DuraTracs for $130/ea + shipping online, but that brings you up to $154 each shipped
Or I could buy a set of Goodyear Authority from Walmart for $130 each. Even with lifetime rotate & balance, road hazard & everything I'm looking at $600 for a set of 4.
The thing for me is I need a tire that will perform well in the New England winters, so the DuraTrac & ProComp Xtreme AT are ideal for that, they both have the snowflake & reportedly perform exceptionally well in the cold, esp the DuraTracs, Goodyear ranks their snow performance 10/10
A set of ProComp Xtreme AT's comes out to $139 each shipped which is pretty hard to beat. But I'd still have to pay for mounting/balancing.
If I could find a local dealer who isn't high on crack cocaine in regards to the DuraTrac I'd buy a set next paycheck.