This from The Delaware Libertarian site:
Exhibit 1: Wal-Mart stops selling firearms in Delaware. Why? Because SB 35 would have required the Sporting Goods departments of Wal-Mart to conduct third-party background checks even for people not purchasing a gun from the store, and the ambiguity of the law led Wal-Mart's liability attorneys to conclude that people wanting to trade or sell guns privately might well reach the conclusion that they had to bring the gun in question in with them. Wal-Mart therefore decided, thanks to the liability issues inherent in SB 35, to get out of the firearms business.
So, congratulations, "common sense gun law" advocate: today there are about seven fewer retailers in the State from which people can buy guns. I have spoken to several people who own gun shops--they were pretty sure this would happen. In the short run they are happy about it because it narrows the competitive field in their favor. In the long run, however, they are worried that future limitations will threaten their own businesses.