Only 1100 Alpha Black Lotuses were printed, and 3300 Beta. And these are cards meant for playing with (and the majority found heavy play). Being little pieces of paper many were straight up destroyed. That said, Unlimited saw many printed and these were more likely what you and your friends had pass through your hands; even these are worth around 50k today.
Nintendo required 10k+ units for print runs on the NES. We can argue up and down that SE was pulled before hitting shelves, but that's not to say there's not a big ol' pile of em sitting in some warehouse unbeknownst to us all. Nobody knows exactly how many were printed.
Simply stated, nobody outside of us here and hardcore game collectors gives two shits about SE. Conversely, Black Lotus (and the rest of the Power 9) have mass appeal to 30 years' worth of MtG fans, old and new. ANYONE who plays MtG knows the Power 9. Ask some Xbox kiddie if he knows about Stadium Events and he'll look at you sideways. The MtG cards have CLOUT out the wazzoo.