You can increase the discount to about 10-11% and attend an UDE event if any are near by to generate a UL code for another 500-1,000 rebate.
But your registration address won’t change by going further and thus you’ll still be paying about $6,000 more in tax vs people in NJ.
So focus on the line items that are negotiable but don’t expect the end number to be as good as some other deals posted on the forum