How to limit quantity for each buyer?

[empirestate]

How can I make ebay to limit each customer to buy only 1 or 2 of my items?

[alexzin]

You can try to set it in your buyer Requirements.

Account - Site Preferences - Buyer Requirements

Buyers who may bid on several of my items and not pay for them
Block buyers who are currently winning or have bought ( ) of my items in the last 10 days.
Only apply this block to buyers who have a feedback score of( )or lower.