Yeah there are all sorts of these unusual cards that are going crazy right now. As long as they have someone everyone knows and are well liked/loved, it's possible that card can get expensive, especially in high grade.
Yeah the ungraded seem to be going for around $200, the 10's listing around $1,800. When I saw the $200 I thought "cool I'll unload that as I have zero attachment" (unlike my hockey stuff which unless duplicate I have no desire to sell). That said, $1,800 makes me think I should grade it.
Kinda funny as I have never once bought basketball (I vaguely remember getting that as an extra with something else). The one card I have turns out to be a good one.
I found some other cool items in that box. None valuable but some old baseball players from 1992 Frosted Flakes (still in their wrapper), a Cecil Fielder Post cereal pop out (unpopped). Just fun stuff. A lot of it only available in Canada I think.
Another oddity is I have the original Michael Jordan T-shirt. One of my all time favorite t-shirts. Was a basketball with wings. That sucker sells for $500 on ebay (well it did like 5 years ago, Lord knows today). Mine is super worn though because I wore it all the time.