So how do you get the best deal possible on a TV? Do exactly as I write below and it WILL work;
The managers are graded above all things in two areas which they will always focus on; extended warranty and accessory sales.
In the case of home theater (HDTV, etc) accessories that are by far the highest focus are Monster products. For those who are scratching their heads, Monster products are primarily expensive (overpriced) cables and (useless) noise filtering surge protectors. A customer purchasing these products and an extended warranty will get a a managers attention very quickly.
Here is the general idea of how to utilize this knowledge to steal a deal -- if you want the 42A10 then let them sell you on a high-end surge protector ($200-400), a couple hundred dollars in cables and a service plan. DO NOT deviate on the items to package with the TV that I just listed; these are vital to getting them to deal as they are very high margin. Once you say you want to buy all this stuff ask for a 'package discount'. Push them as low as you can for the [ackage deal - they WILL NOT want to walk this sale as it makes them look like a hero.
Once you have gotten them as low as you can on the total price the magic will happen - they will write up the sale leaving prices full retail on the accessories and warranty and take the reduction on the TV, even possibly dropping below cost on this. The reason is they are graded by percentage of sales of this stuff based on dollars - they will drop the cost of only the TV.
Can you guess the rest? Buy it all and wait a few days, then return to the store and refund everything but the TV. DO NOT let them tell you to call an 800 # to refund the warranty - they may try that one but policy is to return it in-store for the first 30 days. They will put up a fight on this and may threaten to increase the cost of the TV but hold your ground. If their corporate got wind of them working deals to raise accessory and warranty numbers they would be fired. If you must, threaten a phone call - they will run scared. If you want it even smoother do the return at another location.
This strategy can be utilzed in most of their departments - if you need to know the key accessories for appliances, computers, car audio, etc let me know.
I wont wish you luck, it will simply work. If you have any problems though just drop me a line and I'll help all I can...