RUGER P95 .40 S&W

[Trinity]

I have a pard at work who wants to sel or trade in this gun but isn't sure how much he should ask.  I see on Gunbroker.com that it can be had new for around $350.00

As stated, the caliber is .40 S&W.  The finish is Stainless steel.  As far as I know it is unfired and he has everything to go with it including a box of bullets.

Does anybody have an idea what he should ask?

Thanks!