This is the correct answer.
Plenty of very good-condition 92FS examples out there for ~$400-$450ish. Why bother with a clone?
As much as I agree that police trade-in Beretta 92s are an outstanding value, I still feel the need to offer a counter-point to this statement.
Because the clones are still generally high quality firearms which can be had for $100 less in brand new condition, whereas police trade-in Berettas are obviously used and may require replacement springs, so the upfront cost of a police trade-in isn't necessarily the final cost either.
In addition, not all police trade-in Beretta 92s are the standard 92FS/M9A1 configuration either, whereas most clones are either based on the 92FS/M9A1 or have been upgraded to equal them in terms of features.
Keep in mind that the Beretta 92 design dates back to the 1970s and has undergone numerous revisions/refinements since then. (The latest 92 iteration is the Gen 7 model M9A3.)
For example, a year or two ago there were a ton of imported Italian police trade-in Beretta 92S models for around $300, but the 92S is an older 2nd Generation model which was produced from 1978 to 1982. (For reference, the 92FS is a 5th Generation model, and it isn't even the latest model, which is the 7th Generation M9A3.)
Last but not least, the current generation Taurus PT92AFS was actually the basis for the Beretta 92A1, thus making it the rough equivalent of a 6th Generation Beretta 92, at roughly 2/3rd the cost. Oh, and for all the flack Taurus gets, the PT92 is widely acknowledged as their best firearm, which should come as no surprise considering that it's made to the same specifications as the Beretta 92.