TBH - I'm not concerned at that at the moment. I think it's a mix of people trying to get stuff before it runs out, and speculators looking to cash in on a limited resource. Wait a couple of months, and I think we might see the current prices drop or at least stabilise. If they don't, I think it'll be an indication that the games were very popular, since the demand will still be there.
TL:DR - if you can't find what you want in a store right now, trying something else for a few months, then look again.