if sellshards are able to sell compressed crops at their appropriate prices then selling a lot of stuff will be much much easier chest fps drops are annoying and not fun to balance this out, if there are any compressed items in the chest, then the sellshard is used twice (2000 uses to 1998 uses) instead of once
I think you would also have to have a compression shard, to compress all crops in a chest, for this to work efficiently imo.