The 3904/3906 pistols were only made from 88-91 so they don't show up for sale that often. I feel lucky to have examples of both. The 3906 is the pistol I should have bought in the late 80's when I bought a 5906 but, like most everyone else, I was caught up in the wondernine craze and I didn't give it a second look. I eventually came to the conclusion that ergonomics take precedence over magazine capacity but found that the 3906 is a rather scarce pistol. I found one at Bud's a few years ago and snapped it up. A few months later, I got a 3904 off of Gunbroker and gave it to my girlfriend. After shooting it, I promptly took it back and gave her a 3913LS (of course after shooting the 3913LS, I found a 3913NL for myself!). Keep up the search - it will be worth it.