Most everything I have seen says that in a Master Case you get:
Dagobah Vader = 1/48 (one per Master Case)
and
Stormtrooper Luke = 2/48 (Two per Master Case)
or
Stormtrooper Han = 2/48 (Two per Master Case)
The Stormtrooper Han and Luke seem to be an even spilt, not sure if it is a Hong Kong/Japan difference or not just yet. As for the eBay prices, since you get either Han
OR Luke in a Master Case (and not both in one case), that makes them both 2/96 or 1/48.
For example...
Series 4 Master Case (version 1) has:15:48 Darth Vader
14:48 Stormtrooper
4:48 Emperor
4:48 Hoth Han
4:48 Bespin Luke
4:48 Nien Nunb
2:48 Stormtrooper Luke
1:48 Dagobah Darth Vader
and Series Master Case (version 2) has:15:48 Darth Vader
14:48 Stormtrooper
4:48 Emperor
4:48 Hoth Han
4:48 Bespin Luke
4:48 Nien Nunb
2:48 Stormtrooper Han
1:48 Dagobah Darth Vader
So,
on average (assuming version 1 and version 2 are equally distributed), the Total for two master cases would be=
30:96 Darth Vader (5:16)
28:96 Stormtrooper (7:24)
8:96 Emperor (1:12)
8:96 Hoth Han (1:12)
8:96 Bespin Luke (1:12)
8:96 Nien Nunb (1:12)
2:96 Stormtrooper Han (1:48)
2:96 Stormtrooper Luke (1:48)
2:96 Dagobah Darth Vader (1:48)
If that holds true (all 3 CHASE = 1/48), I would expect to see Stormie Han and Stormie Luke hang around the $90 range for a while...

Jeff