If it is Craigslist and it is a good deal on a pin that is underpriced by an owner you usually have less than 20 minutes before someone claims it. Some games from 60's and 70's are priced in the low hundreds and seem like a good deal. It depends if you like playing EM games or prefer DMD. DMD start in the 1k range and go up from there. As far as "rare" games that people do not realize they have...well that never seems to be the case. It is quite the opposite, people that are not in the hobby and bought a machine back in the day that now collects dust go to Ebay and check what they are selling for. They then price the machine well above market value and state "Several other examples are on Ebay for $$$$$...so this machine is priced to sell."