I have the "one crazy price" rule at gun shows. If I saw a $2200 CMMG on a dealer's table, I would keep walking and not even bother to look at all the other stuff.
From my experience, if they are marking one item way up, they usually have a proportional mark up on all their other goods. At big shows like Tulsa I don't have the time to search for bargains among big piles of gouge. OTOH if they have a reasonably priced item front and center, I spend more time (and money)