Take the Time Single (with Purple Ribbon)
Ytse Jam / Status Seeker Cassette single (Majesty)
LSFNY Korean Box Set (the one with the bandana seems to be super duper rare)
I didn't even know that these exist. The Korean box set with the Simpsons T-shirt yes, but there's a version with a bandana??
Though, now that I think about it, I believe I saw the Take The Time once on eBay a few months ago. It went for around $200 if I remember correctly.
Original German Awake Vinyl (although less so now that it's been re-released)
Not really rare, but expensive indeed. Hardly any copy goes for less than $100 on eBay.
"Tears" promo single mini CD
Every few weeks, two copies show up within hours of each other on eBay for ridiculous prices ($300 or so). Those two sellers really annoy me.
By the way, I still don't really understand why this is so rare. There are 1000 copies out there, yet I always saw this getting sold at much higher prices than the original demo. I'd have assumed that fewer copies of the demo exist nowadays since it's much older, and that the demo is therefore rarer and more expensive...