If you haven't already opened a dispute with Paypal do it now!
Paypal takes fakes seriously, just state that you've become aware the item is counterfit and you will only settle for a full refund.
I had an issue with some GBA games and the seller never responded - I got my $50 back really quickly
If the eBay account is no longer there, Paypal will likely still refund the money on their behalf. They then send out debt collectors after the seller if they don't refund the amount to Paypal.
Wherever possible buy from HMV, YesAsia or CDJapan etc. eBay is an easy place to sell bootlegs, but there are some good sellers out there. Dora_ts7, article_ray, mindofjapan are all pretty good, a bit expensive but there are no bootlegs