Tron is now in my top 5 games- ALL TIME. It's my first NIB purchase as well. I actually wanted/bought a Pro version for two reasons: One, the two I played on route were Pro's, and Two, because I'd be saving more than three grand. Drop targets and rope lights for three grand seems costly to me. I actually was fine with buying a used, but could not find anyone willing to part with one. With that said, I believe the cost will rise for this title. There is already tremendous buzz for the game, and the last of the last NIB's are getting scooped up as we speak. There is a chance that STERN will do a re-run, but I didn't want to take my chances.
Keep in mind also, that I felt the game was lacking at first play when it came out. After not playing it for a stretch, I kept thinking back to how smooth, fast and fun the shots were, and decided on finding a NIB three weeks ago. I even sold my MB to fund it and have no regrets.
So, the short and simple answer is; YES in this case, imo, okay to buy without having played it. I really feel that the more people that put some seat time in with this pin, that heven't, will only drive it's popularity even more. If you hate it, there will be someone willing to grab it because they love it (I do)