I bought it for around $150. Please keep in mind that this was only meant as a back up piece. For primary weapons I am a Glock guy.
Which brings up the more likely scenario: This is sorta my situation, too. You pocket the little derringer when you're going out in a hurry or you're going to a part of town known to you where you feel at least somewhat secure for the activity in which you will be engaging and you figure in the extremely unlikely event of a mugging, the range will be contact and the cops will be there before the noise dies away on the wind, so you won't need more than two rounds. 99% of the time, when I'm running errands with my wife, that's me. I just choose to shove a Ruger LC9s 9mm into my pocket and a spare mag into the pocket designed for such in the cargo pants that have become my signature apparel. I wear them everywhere. Civilian BDU's (the field uniform of my era of active duty, lol) I wear them to work, to the movies, to an IDPA match and everywhere else that doesn't require either a suit or a tux.
So, instead of taking the time to dress around a Sig MK25 9mm with CROSSBREED IWB rig, I just risk a confrontation with the Ruger that is extremely unlikely anyway, but IF it does happen I've got 7+1 ready to launch and 7 more in the spare mag and I ALWAYS carry a spare. I'm carrying a little gun that I know I can shoot center mass from contact out to 15 feet rapid fire. Sometimes, it get's a little worse. Sometimes instead of the Ruger, if I happen to be in a suit or needing to be ultra discreet, I'll shove a NAA .22LR mini-derringer into my pocket. That's a real "mouse gun" and if you whip that thing out in an attempt to deter a crime, the bad guy will probably laugh himself to death before he decides it's real and a threat. I've already decided if I have to pull that baby out and go to work, it's GOT to be at contact distance and I'm gonna just shove it into his eye socket and pull the trigger. I load with .22LR tracer for a little extra sizzle. My point in this long winded response (sorry, but just ask Travis McGee, I love to write as much as he does) is that I paid a lot more than $150 for the Ruger and although the NAA was a gift from my late father in law, I have a practiced protocol for it's use. Back up guns or more accurately, speaking, secondary carry guns shouldn't be an afterthought. Put as much care into your secondary as to your primary. Here endeth the lesson as Sean Connery put it in the Untouchables.