On the whole, I'd say most of the time Priss, 
and almost always Linna cels usurp Sylia in 
expensiveness. And a nice, Crisis Nene can 
fetch a pretty high price since they're so rare. 
Overall, all four can be equally expensive 
depending on quality and the seller. Also, one 
should be prepared to pay more for Crisis 
than Crash in most occasions, depending on 
cel quality. Fetching even higher prices are 
cels from the Hurricane Live 2033 and 34 
music video sets, if they can be identified. And 
finally, doubtless the second most expensive 
type of cel (behind Vision) would be Priss 
wearing her stage costume from Crisis 1. 
-Tom (G.E.)