@phorum_junkie* wrote:

The most effective sanction is just to not buy from them, not because of the high postage cost but because they are obviously grade 1 numpties.

There are unfortunately new buyers who are lulled by these type of  "cheap buys"  so to do nothing is allowing it to continue.  

Or, like Sweet Bea suggests, you can stick your head in the sand and do nothing.