Here are some tips to consider prior to purchasing one. In the antique world, the more original parts and features, the better. The newer machines from 1930 on, have more than likely been tinkered with and might have replacement parts. The antique slot machines tend to have original parts, as replacement parts weren’t common. Slot machines built after 1930 are considered contemporary. Do you have an old slot machine? Do you want one? If you do, it might be worth the search, as some can be worth quite a bit of money.