Why do you ask for sampling charge?

Many prospective buyers would request samples each time when we present a new stock lot. Unfortunately the quantity of the samples in our office are usually very much limited and it would be difficult for us to satisfy the needs of all potential buyers at the same time. Therefore, for first time buyers, we commonly ask for $20 as minimum sampling fee which is not calculated based on the unit cost of the product. This is only to ensure that all the prospective inquiries for our stock lots are of genuine interest. Wish this could be understood by our clients.