I have 265 models total; about half are armor and half are aircraft. Out of my collection, I have 85% diecast, 10% plastic, and 5% resin or resin/crushed stone. I have no problems procuring plastic, resin, or resin/crushed stone if I feel that it will be many years in the future when a diecast manufacturer produces what I have that is not diecast!!

I do have more plastic armor than plastic aircraft and all of my resin or resin/crushed stone is armor.
Speaking of plastic, on another thread, we talked about 21st Century recently releasing some outstanding plastic armor in 1/32nd scale. The Czech 38t, Hetzer, and 2 Marders (I still believe that the rear-mounted engine variant is a Marder II, but I could be wrong!!

) were purchased by many of us, regardless of the fact that they are 100% plastic. This proves my point that most of us lean towards detail, quality, and accuracy, of which all of these PLASTIC armored vehicles possess. Had these been made mostly of metal, then the prices would be closer to $100 each for this quality!!

By the way, 21st Century has been making some outstanding 1/32nd scale aircraft lately!! Their FW-190 'A' and 'F' variants are very good and they fit right in with my 1/32nd scale Corgi and 1/32nd scale Hobby Master!!
