Stoot has mentioned that there will be infinite item storage. Perhaps within something craftable.
He also said that having a million cherries will not necessarily be an advantage. However, some of us are hoarders by nature and have an awful lot of 'stuff'.
So, even if it is as a one off when the new storage becomes available, could you consider either a buy back of bags (80% like the tool vendor and current housing) or a part exchange with the new storage?