I live in PA but work in Jersey. I am in the process of buying a revolver from an LGS here in So. Jersey where you can't believe how crazy it is to run this kind of business!
If the buyer in Jersey gives you a nominal advance deposit for the sale, ship the 17 round mag to the third party in PA in exchange for the 2 - 10 round blocked mags. The mags have to be permanently blocked to be legal in New Jersey, the FFL in Jersey will disassemble the mags to verify they are permanently blocked and cannot be converted, the "blocks" are either riveted or glued in to the base of the mag tube so that any attempt to remove the block would destroy the mag tube. Good luck trying to take one of these apart for cleaning! You might be better served to add the cost of 2 new 10 rd. round mags to the sale price, ship the new 10 rd. mags with the gun, then Gunbroker the 17 rounder. Once you get the 10 rounders, ship the gun and the 10 round mags to the FFL in NJ after you get the balance of the money for the sale! So the mags and your gun are legal for sale to a qualified NJ buyer, and you've been paid for the gun. After that all transactions are strictly between the buyer and the FFL in New Jersey to complete the state law requirements. And your buyer in Jersey needs to secure a separate NJ state pistol purchase permit to buy your specific gun, in addition to having a NJ State Firearms ID card, which requires an extensive background check. These permits take time to get, and the FFL won't release the gun until the permits are issued, remember the system in New Jersey is designed to discourage you from buying the gun in the first place! As a PA resident, I don't have a NJ State Firearms ID card, so I can't buy pistol ammo or shoot at a pistol range at one of the very few places to do both in NJ! OBTW, the two states are right next to each other, but my PA carry permit is not reciprocal in New Jersey. Even though I have a valid PA license to carry, you can't believe what you go through as an out of state resident for a Jersey carry permit! You Folks Down South are "LYAO" by now but this one will put you on the floor; with a firearm egally purchased in NJ, and a valid NJ carry permit, you still can't physically carry your gun with JHP ammo, you can legally only transport it to & from point of purchase and to & from a pistol range, and you can shoot it at the range, but you can't otherwise carry JHP ammo!
If your buyer does not have the NJ state pistol purchase permit to buy your specific gun, in addition to having the NJ State Firearms ID card, and I would ask to see copies of both permits, you ain't ready to do this deal, and if he backs out on you it could be a real headache!
