No -- the only way to guarantee that a particular product becomes yours is to add it to your shopping cart and check out and pay for it. Your KnivesShipFree "Wish List" is simply a shopping list you save for later.
The same is true, by the way, of your KnivesShipFree shopping cart -- adding an item to your cart doesn't put a "hold" on it. It remains in inventory (and available for another KnivesShipFree shopper to buy) until you or someone pays for it. If more than one shopper has a product in their cart at the same time, the first to complete the checkout-and-payment process owns it.
Over our many years in business, we've found that solution to be fairest to our customers.