1. Hot Dog Roller
2. Basting Sauce Pot & Brush
3. Potato Grilling Rack
4. Himalayan Salt Plate
5. Hanging Shish Kabob Set
6. Folding Rib Rack
7. Fill N Grill Patty Maker
8. S'mores Grilling Basket
9. Long Handle Salt & Pepper Set
10. The Spice Arm
11. Meat Shredders
12. The Ham Dogger
13. Grill-Compatible Ebelskiver Pan
14. Potato Nails
What You Already Have That Makes This Unnecessary: potatoes without nails in them.
Supposedly these make potatoes cook faster and more evenly, but a) humans have been happily roasting un-nailed potatoes for centuries and b) removing scalding hot metal nails from potatoes doesn't totally sound like my idea of a great time?