These have been out of print since 1996 but they don't seem too hard to come by.
And don't worry, these have nothing to do with the SEs.
I got mine off of Amazon for $90 bucks new.
It is $195 at retail supposedly but I've never seen the collector's at retail, I've only seen the seperate cassette collections at retail stores.
But Amazon has it new for $122.85 and they have some "Used and New" from as low as $80.
Edit: It seems the seller I got it from (bodean888) has another copy up for the same price I got mine, still factory sealed(as mine was).