You might have to go industry grade for lowest price: the monitors theaters string together to make a large screen at the concession stand, or the monitors McDonald's would buy if they were to build a new joint. Since you'd be ordering 10... you can get a discount. I am looking for better sites than the ones I am turning up.
What are you planning with these 10 monitors? Make a surround screen? HardOCP would have you beat with their
24 monitor display.