Large chain store (K-Mart, Wal Mart, Ect)
Large chain stores generally have the best retail pricing around. The downside is that their clerks are often clueless and selection is somewhat limited. They are also fairly useless when it comes to any kind of after sale service like installing accessories or warranty repairs. Some of these stores, like Wal-Mart, will sell firearms on special order that they do not normally display on the shelf. This may be useful in areas where local gun shop and pawn brokers are stubborn about pricing. These stores also take credit cards and lay-away. They also usually carry a considerable amount of clout with larger distributors, thus sometimes making certain makes and models available when the market is tight or there is a rush on some items. These factors make the big chain stores a good source for pre-ban panic buying on a budget. For example, when the hi-cap magazine ban hit in the early 90ís, Wal-Mart had plenty of the 30 shot .22 mags in stock. I simply went down with my meager $50 and put $250 worth of them on lay-away. A normal gun shop would be wise to such a game and probably never allow it.
Customer privacy at the big mart stores is also an issue. While very few are rabidly pro-gun patriotic, buyers do enjoy a certain anonymity in numbers. The clerks also enjoy this level of anonymity in that they are frequently hired and fired at these stores and sloppy paperwork is fairly common. Because of this, they are sometimes under more legal scrutiny than other gun and ammor retailers. It is common for them to register ammo purchases even when it is not required by law. Keep in mind that strangers not particularly sympathetic to survivalism will have access to records of your purchase. They may also use the information to case you out for theft. It may be a good idea to have a friend or associate work for a short time at such a store in order to facilitate any "special" purchases you might make. After a month or two, the paperwork will be sufficiently buried.