It is up to you to decide if in YOUR opinion postage is too high.
If you buy from sellers where it says "Posts to USA and many other Countries", that is Global Shipping and the postage is decided by them NOT the seller. GSP is high at the best of times and not particularly fast.
In any case postage is what you make of it, Item price £10 Postage £5 is no different to Item Price £5 Postage £10, or £15 Post Free. You pay the same, fees for the seller are the same.
Which of those would you choose, you either buy or you don't.
