Think of what might happen if they listed bore condition and the buyer disagreed with their estimate? The addition of a bore evaluation is always going to be different by each person. 1-10 scales are even worse than NRA way of listing them as good, very good, excellent, etc.
The addition of a bore description adds another problem for the auction house, and another loophole for buyer's remorse if they got caught up in the bidding, and want a way out later. I doubt they want to open that can of worms.
