Match distance to the buyer against shelf life. Paddy straw is sold the same day and cannot be refrigerated below 10 degrees. Oyster keeps 24 to 48 hours at room temperature. Milky keeps 3 to 4 days. Button keeps a few days chilled. Shiitake can be dried.
A buyer three hours away therefore rules out paddy straw and makes oyster risky without cold. Buyers also know different mushrooms: northern cities know button; eastern and southern markets know oyster, paddy straw and milky. Walk the mandi before you buy spawn.