I have seen prices for machines go up considerably over the last 5-6 years. It's supply and demand and many new people want machines and people are paying. NIB prices have jumped because of this as well. And people are over paying for restored/shopped out pins. Until people quit buying overpriced pins this will continue.
You can still find decent prices but you have to be patient and have cash in hand and be quick. They don't last long.