Are you talking about purposely underdeclared goods? My point is that the seller won't be able to recoup losses above the value stated on the customs form.
As we're talking about importing hammocks that cost well over £15, my point about postage etc is valid. I wasn't trying to make a point about goods within the tax thresholds, just make a point within the context of the thread.
Yes the person would as he/she could get charges reversed via bank or gateway as already mentioned. The amount of package is irellivant as that is sellers responsibility and does not affect buyers rights.
It was a bit offtopic chat and not really specifically related to the OP but just general.