Well, buying it because you liked it is the best 
reason to get a cel ^^  Actually, it seems like 
the majority of dealers label Taka as Tamahome.  
No one is posting spoilers, but in case you are 
curious...

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Tamahome was Miaka's love in the tv series, but 
since he was actually a character in a book, this 
was slightly problematic.  At the end of the 
sereies, he was reborn into the real world so he 
could be with Miaka.  However, in the 1st (kinda 
sucky) OAV, his presence causes problems there as 
a link bewtween the two worlds, so he has to be 
reborn AGAIN for the second OAV, this time 
without memories.  And this second time reborn 
Tamahome is Taka.  Make sense?  If not, blame the 
first OAV ^^;;

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Actually, though I am still looking for the 
perfect Tamahome cel, I have found the perfect 
Taka cel.  It's from OAV II ep 4, the same scene 
that Ryoko said your cel is possibly from ^^