In 2013 I bought 15 flat panels with 48 leds each from an Ebay vendor for about $21. I only needed 13. We're going into our 3rd season with them and all are still working great. Even if one or two die, what do I really lose?
Yes, you can spend a lot more elsewhere and get a real warranty. But then you have to send the old bulb in and wait for a replacement. For the same number of bulbs from a US vendor, I would have had to spend closer to $100.
And the kicker is, they are all made in China no matter who you buy them from.