i live about 35 mins from the Delaware border (home of tax free shopping!)
i buy ALL of my Apple products at the Christiana Mall Apple Store. well, i buy them online so i can buy a refurb and with cash back. i bought my iPad 3, 64GB LTE refurb and had it shipped to the store to save the 6% sales tax. it saves me $40, minus $5 in gas so $35. that's a full tank of gas in my other car
however for my iPad 2 i ran into an issue where the screen was defective. i took it back to my local Apple store for an exchange and they would not allow an even exchange. they said i had to return and re-buy another one and pay the 6% PA sales tax. i told them the iPad is defective so i just want an even exchange. they claimed PA forces them to initiate a new transaction from out-of-state purchases that did no have sales tax. i think it's an Apple Store policy of one store trying to get credit for the sale to boost their numbers. Sears does the same thing, i took something back b/c it was defective and instead of doing an even exchange the guy returned and did a re-buy using his associate #. when he did this, he screwed up the sale price and it was a mess. i told him before he did it that b/c it was bought on sale it would make the transaction messy so just do an exchange. his response "it's more complicated than you think" . HA
so word to the wise - if you buy an iPad from a nearby state to save on sales tax, open it up in the store and check for defects PRIOR to driving home.