Hey, I'm new here, but I just purchased a TV from Costco and was debating between originally buying it from either Costco or Amazon. I called Squaretrade the other day and yes, you can buy the warranty through Costco for a non-Costco bought tv, but it only covers 3 years Total, not added onto manufactuers warranty. So if you buy Squaretrade insurance from Costco for a TV purchased through Amazon, you'll have a total of 3 years protection (which is still probably enough). If you buy the insurance from Costco for a TV bought from Costco, the 3 years gets added onto the 2 year warranty from Costco, for a total of three years. That's how I understood it anyway when I talked to them.
I have 60 days to buy the insurance from Costco for my tv that I just bought, not sure if I'm going to or not yet either, so I would like to hear some feedback also. I purchased the LG 60PA6500.
It seems that you can also just order it online from the Costco website, vs actually going into Costco, also, if that was part of your question.