I'm certain that most on this site will applaud any possible sales of confiscated firearms by police departments (or whatever agency does this sort of stuff....). I have to say, though, that for most chiefs of police..... nothing provides smaller benefit while increasing the risk to your job.
In short, unless agencies/political entities are in dire financial straits there's little to gain and lots to lose selling confiscated weapons. Guns last a long time (the few weapons I own will long outlive me... ). Careful research can trace a weapon through the various owners from when it first left the factory to whoever has it now. As a result, if I were a chief and my job was only as strong as the political judgment of whatever council or administration I worked for... you can guess what my decision would be. During my 22 years in law enforcement I worked for five chiefs of police and not one of them would want to sell the first weapon that might end up in the wrong hands. The fact that you or your agency had absolutely nothing to do with whoever legally purchased that former confiscated firearm wouldn't save you from the adverse publicity in the slightest. Selling weapons that were City owned property was bad enough -but confiscated weapons?
Like I said, as much as we'd like to see an opportunity to purchase these kinds of weapons.... I think that you'll see very few of these kind of sales.
As a young police sergeant I was in charge of our property room for about two years (guns, dope, evidence of every kind, etc.). It was my job to carefully account for every weapon we held, return them to their rightful owners if proper, or hold them for eventual disposition. In some cases that meant converting usable quality weapons to City property (and a few years later I was issued a Beretta model 92 -European version with mag release at the bottom of the handgrip..), or store them for eventual destruction. None of the few chiefs I knew would consider even for a moment selling confiscated guns. At the end of my two years I did destroy an entire large garbage can filled to the top with confiscated firearms....... That was in the early eighties down here in south Florida.
I'll be interested to follow this topic and I'm sure that many here will disagree with what I've just said - but it's an honest view from someone who was inside "the system".