The shipping cost model offered by the seller.
The calculated shipping model: the posted cost of shipping is based on the seller-offered and buyer-selected shipping service, where the shipping costs are calculated by eBay and the shipping carrier based on the buyer's address, and any packaging/handling costs established by the seller are automatically rolled into the total.
The seller specified one or more calculated domestic shipping services and one or more flat international shipping services.
The flat rate shipping model: the seller establishes the cost of shipping and cost of shipping insurance, regardless of what any buyer-selected shipping service might charge the seller.
The seller specified one or more flat domestic shipping services and one or more calculated international shipping services.
Free is used when the seller is declaring that shipping is free for the buyer.
The freight shipping model: the cost of shipping is determined by a third party, FreightQuote.com, based on the item location (zip code).
The seller did not specify the shipping type.