Ken, I gotta weigh in. Doing this by year like this just makes no sense to me whatsoever. Speaking from experience with Wade, where I bought 25 pieces of the Fast Draw in advance, the biggest factor in choosing a PF to repro is the number of units that will sell. TKO? Come on. Everyone who owns one could buy one to put in their game and another one for a spare and he'd sell 12 playfields. Add two for the ambitious and skilled among us who would build their own game, IF they can cajole someone besides BG Resto into doing the glass.
On the other hand, I am interested in a Jack in the Box. It also fits in a Jumping Jack, and they made 13,000 of those games. The ones in your poll total about a thousand. I'd also go for a Slick Chick, they made about 5000 units of that game.
The other big factor is cash up front, not promises to buy so long as the "buyers" don't change their minds when they get done in a year or two. I'd go for ten of either of those playfields, 50/50 advance payment and on completion. And a little quantity discount would be nice
Just my $.02
Joe