need to do the same myself, have vast collection of N,00,some US H0 and dabbling in 0 gauge as well,Also huge amount of G scale to clear out from when I had a garden railway.
Just keep enough stock for the layout you have....... Said my honey.....Yeah whatever, trouble is I have now built six different era layouts, and sold five but kept the stock.....had to dispose of all the boxes and build my own storage crates to house it, now what do I do?