Callenish, I have seen a few purveyors who held the weapons until the close of day or fest and then delivered or shipped. Another way around is to "display" a piece, sell it, take it home and ship from there. I mean, we are all going to be armed to the teeth anyway, what's a few more weapons? Also, I remember a sword dealer there my first year.
I'm sure there is a work-around or solution somewhere.