I ordered my 50GT25 off Amazon on Wednesday, then saw the low price listed here yesterday for US Appliance and requested the price match. For all of those wondering, it took about 24 hrs. for Amazon to reply by email (which it says in their policy).
Here's the catch: they would only price match for $12.98 because the free shipping offered by US Appliance is ground shipping (drop off at your curbside or driveway, no help unpacking or setting up), while the free shipping Amazon gives you is "white glove." I double checked US appliance and this is indeed the case: you have to pay another $90 if you want their "white glove" shipping where the TV is brought into your home, unpacked, then set-up where you like. Both options have scheduled delivery times.
Additionally, you only get one chance to use the price match policy, though Amazon allows you to wait and see or take the current offer.
For me, I think I'll wait and see if any other offers pop up over the next two weeks. For those considering the difference between the Amazon offer and US Appliance, it's a much smaller difference than you think, unless you don't mind taking it in from your curbside or driveway. With how cheap I am, I still would have taken the ground delivery and found a way to lug it upstairs, but I do feel more confident in Amazon's service and return policy, so...
Anyway, hope that helps.
P.s. Thanks so much to all of you who post technical help, you rock!