I know I am not BU, but I know this board gets the most traffic:
I purchased a small clock for DH from an Amazon Marketplace seller called JACME DISTRIBUTION for about £5. I confess right off the bat that somehow I missed that the shipping would be £20 and by the time I realized it was too late to cancel the order. When I queried why so much, I was told they only use a courier to Ireland and Northern Ireland and that was how much it costs.
Okay, no problem, my mistake. Its a very cool clock that talks.
However, when I received the package it was not shipped via a special courier, but by Royal Mail and cost the seller £2.37.
I raised another query with them on this, saying I really should get my £17+ back. They told me too bad so sad, you knew the fee.
So they just made an additional £17 off of me.
I have left negative feedback and also raised a complaint with Amazon.
But, by the power of Mumsnet, no one use this Marketplace Seller. Please.