Nice find, The Apple IIe card is very cool, and and NeXT stuff is great for any collection. Good that the IIe card came with the Y-Cable, they are nearly impossible to find by themselves. My Macintosh LC came with the IIe card, it is a very neat trick.

I Believe the IIe card was a way to let education customers switch to macs from apple II's, and not have to rebuy software they paid thousands for a few years ago. IDK if that ploy worked, but the card seems to be somewhat rare now. :-/ Nice that you found one

To end out my long and rambling post, Nice finds!