No, all inventory is available for purchase up until the point of a payment being processed. Due to technical limitations, we are unable to have items locked in shoppers carts as someone could potentially hijack the entire sale. Once you have gone through most of the checkout process, our system will check all products in the cart to ensure that the products are still in stock. This is when our system will hold the products until payment is complete, which is when the products will be removed from the sale's inventory.