>paying another $40

That is the problem, at least with US vendors it didn't used to be only a $40 mark up. Its been anywhere from $65 to $80 mark ups for GMK sets on a lot of US vendors until just more recently (I have seen a particular vendor that had higher markups than that even).

I totally get there is going to be some mark up for extras, after all extras are just the vendor saying "we want x amount of sets, so that we can sell some more in case people didn't get a chance to join the GB". So they are paying for those extra sets out of their pockets, so of course there needs to be some sort of return on those sets on top of what they would already be making at GB price. Totally reasonable, its just when they are getting marked up $65 to $80 above what they sold at GB for, that is just a little bit too much. Again, not sure what the markups are over on the UK vendors, but glad that they don't seem to have been as bad as some US vendors.