Years ago when i started collecting diecast i made 2 large cabinets with glass shelves, the back has 1/4 inch foam tape and the front doors also have the foam tape,so when it's against wall it is sealed from dust, after being in there for 10+ years (no dust either) i moved them to make room for my builds, i figure 1 cabinet can hold 225 to 250 models, no chance in this life time to fill them up