Actually they probably only make $500 at most off it at $5000, you forget how much they have to pay to buy it in the first place. With the 1500 price, they're losing a lot of money.
first of all the only tv i see for 1500 is regularly priced at 2500. i would bet the suggested retail is probably 3000. they price it 2500 to compete. and wholesale, i would guess they bought it for 1/2 of the suggested retail at 1500. so they break even.
or if there regular price is the suggested retail they are still making money. 2500, 1250...