You can order the item even when the inventory value is negative because this is a preorder. Pelikrypta has a retailer pledge for Frosthaven + extras. Estimated time of delivery first fourth of 2021.
This set of vinyl stickers replaces all of the normal ones in Frosthaven. If you don't like the permanence of normal stickers, these vinyl stickers can be removed at any time with no damage to the components.