I now always recommend NIB for first time buyers. That said, new games often need more than just regular cleaning. Trough opto connectors can rattle loose, flipper transistors can lock on (and need replacing) and opto boards connectors can go flaky, among other things.
What do you bring to table? Are you mechanically inclined? Good with hand tools? Do you know how to use a volt meter? Ever soldered? If you're mechanically inclined, most everything else can be learned quickly. Youtube is loaded with how to videos.
If you do take the plunge, you'll want to invite a local with some experience to the unboxing party. Not unusual to find one or two minor issues right out of the box. If you're really not sure which game to buy, pick the one with less moving parts. If it looks complicated, it's likely more prone to breaking. Although MET's snake is a big exception. There have been a few reports of them needing minor adjustments, but overall it's a complicated toy that works very well (GET A MET PRO!!! d;^).
For cleaning, Novus 1 or 2 and a clean microfiber cloth is all you need. Clean when you see ball trails in the inlanes.