........ How do you get them to reproduce? 
By becoming quite brash actually. "Hey cute thang, wanna........uh dance?"
I've gotten to where I don't hesitate to make low offers. Most of the time I'm shot down or they just don't respond. But sometimes you hit the jackpot. I also troll the real auctions. I've got two pre-bids in for an auction this Saturday. There'll be heck to pay "She Who Must Be Obeyed", if I win, but since she likes bargains, it's my ace-in-the-hole.
I just emailed an on-line dealer to tell him the gun he was trying to sell for $799 is subject to a safety recall AND now that he know that he needs to disclose it to any perspective buyer.....oh and I'll buy it for $350 as-is.
But basically, I've become addicted to stainless, pre-2000 Smith big bore revolvers. 624, 625, 629 and 686. Can't get enough of them.
Need more money, for more reloading supplies, for more ammo. Must have more! Me precious.