I think the longest I went was around a year.  
The cel that pushed me back, head first, into the 
hobby again was this cel of D.  Back before I 
stopped collecting for a while cels of D, 
especially with his eyes open, were very rare and 
very, very expensive.  I remember that cels from 
the original VHD movie were going for the prices 
that the cels from the new movie were going for 
at first. 

I still think it's a great cel even with all the 
other original movie cels coming out from hiding 
and I still got it for a great price ::)