Well first of all since I sell grills at Home Depot I'd be remiss if I didn't propose http://www.homedepot.com
There are a lot of great buys out there on ebay too. Pay attention to the sellers feedback and the description of the merchandise. Decide how much you would be willing to pay for the grill and SUBTRACT THE SHIPPING AMOUNT FROM THAT FIGURE
to come up with your maximum bid. If you win the auction and your happy with the item then you get a good deal.
I got my Jaccard Meat Tenderizer on eBay and I think its worth its weight in gold.