Nevermind I didn't understand what your post was saying originally. Yes, I agree that would be stupid.
In FFXIV sellers decrease their item in 1 gil increments.
In FFXI buyers increased their offer by 1 gil increments.
A better solution to 1 gil undercutting would be to make crafted items be desirable for more than just glamours. Very few people go for crafted gear on my server.