I think its super hard to ask a cel collector 
his/her average spending just because some times 
there are a bunch of good cels that pop up at 
once or there are no cels at all for a period of 
time. Then when a convention rolls around, you 
spend like 4 months worth of cel money in one day 
some times >_<
Hmmm when I bid on YJ, its usually not just for 
myself because a lot of times i'm bidding for my 
friends to save on shipping cost. Last batch of 
cels were about $500. I just got another Laputa 
cel which was about $300.... it all depends..