Do not let the store clerk fool you with a bunch of tricky talk about this item not being able to be discounted any further. The floor models are used. They may not have been used in someone’s home, but they’re used nonetheless. In some cases, for much longer than if it was in a home; especially those TVs and computers that are on the shop floor day in, day out.
So, find a manager and ask for the price to be reduced beyond what is shown on the sticker. They want to get rid of these items. They’d obviously prefer to sell it to someone who will pay sticker, but they will go lower. And as the item is used, and most likely blemished, you should demand a discount. I do this every time, and it has worked every time.