About 5 years ago I had a search bot app for Craigslist.
I had it watching for Magnepans.
After about 6 months the right deal came along... a pair of mint, SMG's with magnariser stands for $250.
Although the app had done it's job, I left it to continue searching. 2 months later a pair of mint 1.7's had popped up, so I grabbed them for $500. The owner had gotten a promotion that required he move to Chicago immediately. He was selling a spacious house and moving into a tiny, expensive condo in downtown Chicago.... no place to put the Maggies.