As far as Ultraverse comics go, the silver hologram covers were the bee’s knees. I would have been stoked to find one of these for under $50 back in 1994. Now I wouldn’t pay $50 for a set of all seven ($40, tops).
I still think they are very cool and I have picked up a bunch over the years, it’s just that you don’t have to pay that much for them (just ignore all those BINs for $20 and up on eBay). It’s very easy to pick up individual copies for under $10 shipped, sometimes half that much.
Just make sure the person you’re buying from has a decent rating and reliable shipping feedback. Hologram covers are easily damaged and once they have a ding or a few crinkles they don’t look nearly as nice. I won a lot of all seven for $20 once, and somebody in the post office must have dropped the envelope on its corner, because all seven books had a massive ding in the same spot. Ruined. And they appeared to be pretty much in near mint condition beforehand. I looked like that guy in the bottom left of the Prime cover (above).
Actually, these books aren’t that rare. There were 5,000 copies printed of each for a total of 35,000 (not counting 5,500 for the gold Ultraforce comic or the seven gold hologram versions — no idea of the print run on those, probably not very high). But for eye appeal, you can’t beat them. Any self-respecting Ultraverse collector should nab a full set of these.