Slabbed Games and comics are a resellers niche that will eventually burst like the other collector bubbles of the past. Im starting to see comics that are slabbed drop in price or be sold "accepting best offers" due to the fact that these "collectors" were only there for the money and now need to cash in on their junk bonds, as long as we all don't show them interest or even offer them low prices when we see them at Cons or other markets we can form a united wave that will eventually wear them down. its not gonna be over night thou.
Unfortunately this hobby is now a full blown market and we see the over inflated prices even at swap-meets. Don't get me wrong there are plenty of brick and mortar shops that don't over charge, but get picked clean by resellers.