AEG just put up the koku redemption offers. Rares from Torn Asunder are going for 20 koku a piece.
Banned cards give you 20 koku when sent in.
On order to access them, you need an Imperial Assembly membership (these run about $30). The going rates for getting these cards go for $1.25 for 9 and $1.75 for 18. If you are apart of or near a stronghold store (these are stores registered with AEG for prize support tournaments) they can usually assist you with getting an Imperial Assembly membership voucher for free.
The quality and care of the cards are always in good shape, so no need to worry about getting damaged goods, and AEG should be good with dealing with returns.