I took the top 20 pins and plotted them using (ranking,price). This shows what pins may be value pins and which pins may be not be such as value.
This chart says a few things, IMHO
1) TZ is a great value. It's rated #2 and is approaching half as much money as the game one position above it.
2) WoZ doesn't look like a good value. It's also 2 times more expensive than the pin ranked 1 higher (Wh20). Plus, based on the trendline, the price is out of whack
Anyway, you can interpret the chart however you see fit. It's simply interesting to look at, IMHO.