"I can say that televisions have surprisingly low margins."
Like most things in life this is entirely subjective. When I bought my Sony KDL 46X2000 LCD TV a couple of years ago it was £1.400 cheaper from a small scale specialised TV dealership in Glasgow with a 5 year warranty, than it was from a major Supermarket's on-line store, with a 5 year warranty. I was able to view it in store side by side with other TV's and pick it up from their warehouse that day. Both suppliers were obviously making a profit. and I doubt that the on-line store was making a lower profit margin. It was not an end of line product and it seemed to me that despite the superior purchasing power of the on-line supermarket they were clearly happy to make a far bigger dent in the savings I had worked hard to accumulate. Surely staffing costs, leases, rents, etc will vary from dealer to dealer, as will the profit margin they are prepared to accept, as is illustrated in these circumstances by an on-line store charging more than a shop based dealership.
Obviously such deals will vary from time to time and between shops. I have also had experience of a local specialised dealer refusing to negotiate on price at all despite the fact that he was charging £650 for a product that was available locally from a major home cinema chain dealership for £500. I wanted to support the specialised dealer but not at any cost, from the outward signs of wealth it seemed that he already was wealthier than me (house, car, etc although they might have been on credit) without me adding to it.
In general, I can understand consumers trying to obtain the cheapest deal possible, particularly if their income is limited, but on the other side of the coin I would hate to see specialsed dealerships that charge reasonable mark ups go out of business.
P.S. In relation to the other Sony LCD TV threads, this Sony TV is still working well, although I would concede there is some sligfht motion smearing with fast moving scenes. I have not experienced any of the other problems described with the newer large screen Sony LCD TVs.