I disagree with the "large supply" comment on many of the items listed. But since you feel this store is warranted even selling "1-2 items", I have one final comment: If this is implemented, I ask that andrew consider making the all items be unsellable to the server for ECD.
+1 As long as the prices for the items is at large amounts of experience or at least to where the price is equivalent to that of using ECD I would love to see a shop like this be implemented. Not only would it open up many possibilities like having fireworks more often or even being given access to enderpearls for PVP or even recreational use. Either way, this new shop would revitalize the exp market while also giving people access to the rarer items found in ECC.