Here's a cost comparison of another available coin for the sake of argument.
Lealana 1oz Silver 1 BTC Coin
Total Cost with shipping: 1.26 BTC
Cost with shipping minus contents: 0.26 BTC
NastyFans 1oz Silver 1 Seat Coin
Total Cost with shipping: 0.27 BTC
Cost with shipping minus contents: 0.22 BTC
This is a valid comparison only at first minting.
The nastyfans minted seat coins increase contents with each donation distribution. This reduces the "cost with shipping minus conents" over time. It is possible that the coin someday has the same BTC content that you paid for the coin. This is a very important difference to understand.