They probably can sell them so cheap because they have a faster production rate then most. This introduces more product into the market creating a surplus of supply  to the normal demand. In order to profit from making so many godsets, they must appeal to the consumer by lowering the price and making them customizable or else they will loose money rather then make any. I do understand that the server economy is in dire needs, but this will hopefully get more players to purchase god sets putting more money into to the economy as this price drop will make buying more enticing. ALso, They won’t be ablr to monopolize the market due to the fact this is minecraft, Players are offline more then they are on it and there is higher value in materials and other goods rather than the monetary system. The economy won’t play out the way it does in the real world despite efforts made by the community. An overthrow is needed to fix it andGods has a solution as, so I say let the prices stay as we wait patiently for Godsy to work his magic.