This is a test auction to discover market price; more Jupiters might be available in the future or at buyers request.
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Test

Whats the point, If it's not binding people can "test" bid what they like, This is not going to give you an average market price.
The auction is binding. With "test" I mean that I might decide to make an auction for multiple Jupiters later on, but this on is fully valid.
15 btc plus 2 btc more for shipping
Minimum bid is 40 BTC as stated in the OP.