In regards to the limited edition versions of the swords. They did not sell out all that quickly and were up for quite a few years. The extremely limited ones (250 pieces) run $700 so the market is limited and aimed for collectors. Valyrian Steel does very well with what they limit. They have already stated that with the next releases of the show versions of Longclaw and Ice there will be expensive limited edition swords as well as non limited, cheaper, regular versions that they will continue making for a while and will sell on the HBO shop.