I undercut all the time by a gil because I just want to get rid of it. I gather all my mats and I do it because it's fun to me, so it really has no cost, apart from gear repairs. I try to go with the flow but I'll undercut you by a lot if I think the price is unreasonable, I don't really care. If it bother you buy it and resell it. I'm not doing it to get rich anyway.