I also used Amazon with the same results.
Me too - bought a 52" LG a few years back thru Amazon; local freight co. delivered it and I helped him set it up and test it. Worked fine for 3 days, then it died. Requested an exchange thru Amazon; they sent another one immediately and same freight guy brought the new one out and picked up the old one for shipment back to Amazon. The second TV is still working great to this day, and I'd buy a big TV from Amazon again in a minute (and probably will).