The P9S in .45 is an amazing weapon. It has a great grip, low recoil, quite small for a .45, accurate beyond belief, a great trigger and never a jam. This weapon does not have to be a safe queen, it is a very viable alternative to a USP. It is more concealable than a USP Compact. I actually shoot more accurate with the P9S in close range (25 ft) than the USP Tactical!
The common problems with the weapon as has been discovered over the years is the plastic buffer mechanism needs to be watched due to deterioration because of age and exposure to solvents/oil and the magazine feed lips become brittle and crack over extended prolonged use.
For a 98% P9S in .45 with fixed sights, plan on spending upwards of $1000, more for the target version. They are becoming quite scarce and are purchase quickly when they come to market.