I have never seen an "A" level shot for sale, 
only profile shots.  There was a not very good 
profile on ebay that sold for I think $150.  I 
have seen some nicer profiles go for up to $300.  
I would guess that an "A" shot would be even 
higher than that.

However, with Rurouni Kenshin ova cel, I think 
the problem is finding ones for sale, not the 
price. :)