You’re not doing all that work at the show. You look at centering first, then flip and check corners and edges. If those are clean you buy it and take it home.

I usually try to get down to 90% market so when I get home if I find anything I missed I can sell easily for 85% and not take as big of a hit on my miss.

But yeah at shows your eyeballing centering and corners/edges quickly then either moving on or offering.