Cal. Code Regs. tit. 11 § 4263 : Law — Firearms Regulations — Ammunition Vendors — Ammunition Vendors — Vendor Fee for Processing a Private Party (Non-Vendor) Ammunition Sale
(a) In addition to any applicable Department of Justice fee, an ammunition vendor may charge the purchaser a fee(s) for processing the sale of ammunition between two private parties as follows:
(1) If the purchaser will be present for immediate delivery of the ammunition, the fee shall not exceed five dollars ($5).
(2) If the purchaser will not be present for immediate delivery of the ammunition, the vendor may charge an additional storage fee as agreed upon with the purchaser prior to the vendor receiving the ammunition.