I've been searching about 6 months for a 4506-1 with adjustable sights. Spoke to a guy Monday who has one NIB. Says he'll bring it to the Gunshow Sat. so I can check it out. Wants $539 with box ,and 2 mags. Then my partner calls me and tells me about an unusual 4516 he has located. It has no dash ,lasered markings ,spurless hammer and is NIB with 3 mags. Asking $525. I had searched last year for one of these but couldn't find a clean one. Partner says its a police contract overrun ,so it is made well after production ceased. I'm not a collector ,I'm a shooter. Which would you grab? Don't have enough funds to do both. Thanks in advance for your opinions. Regards 18DAI.