I don't think anyone has agreed to that price. As they are out of stock, they have probably set a low price to give the feeling to whoever has to acquire material that the opportunity is good for any other material. Said perception may not be true and is called reference value, it consists of establishing a price scale based on a reference previously known by the client. If the reference is equal to or less than the known value, they always dare to buy; if it is higher, an excuse will be invented to reject the product.
In this case, it is the seller who tries to establish that reference in certain products (which are not available for reasons beyond their control).