I buy cels from shows I have never seen if I 
really like them.  I started collecting Tenshi Ni 
Narumon cels before I had seen the show (well I 
had seen the opening and decided it was the 
cutest thing ever and needed cels from the show)  
I now love the show and have seen some episodes 
of it and contine to collect the cels (I have 
like six more on the way from japan!)