I worked for J&G a few decades ago when they were wholesale only... they're good guys.
I think a new/mint model 67, 4" stainless runs about $525-$600.
Chances are, other than holster wear, these guns (like most police trade-ins) are in excellent condition internally. A quick inspection/lube by a revolver 'smith and you'd be good to go.
Shoulder Drive Nicholson Club