Old/Discounted and a New/ refurbished Gun dealer

so pretty much there would be two Legal gun dealers for civilians, this is how it would work, the old gun dealer would have Civilian legal guns but made prior to the 1990s, these guns would be cheaper than modern choices and thats all going to make sense soon, examples of guns would be old Colt Sporter rifles, 1911s, some military surplus like Norinco sporters, Remington M700 and 870 with a few expensive military pieces like M16A2s and FALs now these guns would be expensive in their own right but not more than the New / refurbished gun dealer, they would sell guns from the 2000s+ Like Glocks, Bushmaster ARs, some guns could be fitted with attachements like sights, flash lights, grips, in a more modern fashion while costing more than their old counter parts, the most expensive pieces would be SWAT/Military grade weapons like Full auto SR16, Kriss Vector, etc, not only would this allow people firearms at both high and low prices but increase the gun variety which is always a plus.