I fought with them and they responded with some BS in email which is pasted verbatim below (just ridiculous imho):
This is with the Amazon Large Items team. We handle all the TV Low Price Guarantee claims.
I've reviewed our previous correspondence with you, and I'm very sorry about the misunderstanding or incorrect information you received.
The initial transfer form for the TV Low Price Guarantee request submitted on June 19 by did request a price match to $3099.00 against Best Buy for the Panasonic VIERA TC-P65VT50, order #.
However, when the Guarantee request was processed on June 20, the price of the television on Best Buy was $3499.98. Unfortunately, an email confirming this was accidentally sent to an internal email address and therefore never reached you. I'm very sorry about this and understand the frustration it has caused.
According to our Guarantee, term #2: "The lower price must remain in effect at the time your Guarantee request is verified by Amazon. Expired offers are not eligible." Therefore, we must price match according to the currently listed price.
For more information including a list of the eligible sites and the full list of the Terms & Conditions, see the TV Low Price Guarantee page here:
I'm sorry that I don't have better news. As soon as we receive the refused television back to our warehouse, we'll issue a full refund and send you an email confirmation.
I hope you'll consider this an isolated incident and give us another chance in the future.