His point was that he got a better model for a great price. I have a similar story.
I orginally had the 51F510. Got it at CC in MI for less than $1400 dlvd, but I also paid $370 for the 4 yr warranty...probably why he offered me the TV at $1400. I was working w/ the store mgr and he offered this price to me...I didn't even have to say anything other than I wasn't interested at their current sale price, which at the time also included 2 yrs interest free. He basically asked what it would take for me to buy it that day, and I told him to come back to me w/ his best price, which was the $1400 + $370.
Well, my friend then started talking to some schmoe at ABC Warehouse, a company that carries the 51S715, but not the F510. After struggling to decide to go through some hassles to save some coin, I got the 51S715 for only $150 more than the F510, and that price included the 5 yr extd warranty, ya know, the cash making cow. Well, I didn't like working w/ ABC or their extd warranty policy, so I returned the 51S715 to them, and went to Sears and got another 51S715 for the price match +10% difference, but this time w/o the extd warranty.
Basically, I figured that ABC only gave me the price they did for the S715 because I was also getting their cash-cow warranty. However, they itemized the receipt such that the discount was taken all on the TV price, while leaving the warranty at the full $379.95.
FWIW, I do notice the difference between the S715 and F510 and am glad I went that route, but it was a no-brainer for me since the price was so low. I figure that the integrated tuner will come in handy sooner than later, and the USB input and black trim is pretty nice to boot. The F510 is a quality set as well, though.