I have 5 display cases that hold my finished models and die cast I have collected. Those hold about half of my collection. If you fellows want an idea for a inexpensive way to hold your finished models try a gun cabinet. 3 of my display cases have been made from converted gun cabinets. You can find nice used ones pretty cheap. I just remove the upper rack that holds the gun barrels then beef up the back with some cheap 1 x 2 's and then just buy the brackets and the rails for those adjustable shelves you would normally put on the wall. They are not 100% dust free but if you add some weather stripping of some sort they can be pretty tight.