First, we had these two effect packs:

They are now very sought after and reach $100+, though sometimes, they'll be for $20-100. Sites that have them for $40-50 are SOLD OUT, so you'll have to wait for deals to pop up, sometimes AmiAmi gets these in for $80. Other sites like MANDARAKE and Easy Auction Japan have these too for around $40-$200+.

Coming September we'll get: Two NEW effect packs. The one with the rays is 2,916 yen while the SX-III is 3,240 yen. Get these at the Tamashii Web shop as BBTS is selling them for $60 and $65.