Lol
Discounts or not, that will depends on how your bargain skills are. If you are those quiet type just pay and go, then high chance no discounts.
Open mouth and ask and see what they give.
Usually for me, YL does give cash discounts. The discount varies across all the items.
Usually what i noticed is that things that are expensive lets say $1000 item, he can give discounts from $10-25.
As for items that are cheap, don't expect much discounts.