In reply to TobyA:
> Thanks Rich - I guess that was a tenner for one though? So I'm going to have double the weight.
Nah, it's a non-linear scale. I paid about £8.70 to post a Grivel Matrix Light (didn't dismantle it, just cobbled together a bubblewrap-and-cardboard thing. Royal Mail. It was recorded delivery or special delivery - whichever one is the best value way to get insurance cover. I think it was covered for £400, I had a reference number. I just took it to the Post Office and sorted it there.
I imagine a pair would have been £12-13 as someone suggested, and not £17.40