IF you were selling it for $1 plus $300 I would not buy from you.  As I said if you dont like the charges the seller is offering dont buy.  Its as simple as that.  But once you commit to buy dont leave negative back because you think the post is too dear.  Ask about it or DONT buy.  Why is that such a hard concept for you to understand, neither eBay or the seller are forcing you buy from them. 

By your theory it will be OK for eBay to force sellers into free post so they can charge fees on a service they don't provide.  Give us a break.