I got my SS General for the stock price + postage + £16 duty + £8 Royal Rip Off Mail charge.
I do think it is out of order that you are not given the option to pay duty and customs direct without the interference of Royal Mail. In these days of electronic mail it is not impossible for C & E to mail you and ask for payment.
The postage charge is a reciprocal agreement, I believe, so there should be no further change for postage.
If anyone knows more or better than this, please share and it might ease the hurt on a poor Jock's wallet.
Cheers Guys Keep on Shaving.