xoticpc.com
bestbuy
on-line stores
depends where you are.

You really need to just check out all the retailers for a sale. Beware of though understand what you expect to get and insure each unit you look at has what you expect. Don't compare oranges with apples seriously if you look at the Best Buy models you find that the have less and poorly positioned RAM, Slower hard drives that's how the sell you a cheaper machine. You said G751JT look for the letter and numbers after that and source out what features each has. All G751JT are not created equal. Got that all figured out look around for the best deal you can get when your ready to buy or find who has the one you want and just wait and watch for a sale.

a quick google search finds pages of retailers