Went hunting, caught some unicorns, work horses, and some donkeys. ...
Was a box of random bits, these are the highlights...
Unicorn (and -ish): The real deal is I guess that Voyetra MIDI card, MPU401 interface, OP-400x board WITH the dongle. Then a Paradise/WDC 8 bit VGA card, an 8 bit floppy card with manual that can be set to secondary address, and supports HD floppies, then the ST-02 that also supports HD floppies, and has bootable SCSI interface. Finally, a monster sized fax/modem card with a scanner interface from "The Complete PC Inc" whose claim to fame is semi autonomous send and receive of faxes under DOS and document to fax and hand scanner capabilities, quite a "featurey" card for the late 80s. Yeah it's like Vogons Pimp my XT edition up in here today.
Workhorses: ISA I/O with leaflet manual, 3Com NIC ISA and PCI, Realtek NIC, the SARC card might actually be more unicorny than the VGA since nobody seems to have heard of it, but herc/CGA are in general common-ish and less sought after. Yet another Rage 128, AGP.
Other and donkeys: Not pictured. Two 4GB IDE drives, two desktop trackpads serial interface, never seen those before and I get 2, Cirque brand. 12GB Archive tape drive, apparently SCSI. and the real donkeys, a "scanner" scsi card, 25 pin external only, and a PCI modem.
Also followed me home, SFF Acer system, AX1930, sandycrotch era, not sure what CPU, OEM was a Pentium yawnmonger, dude said it got a quad core upgrade, so might be a decent i5. Got a GT710 PCIe 4x card in it, which is meh, but kinda good for low heat and decent features, might become HTPC kinda thing.
Apologies if photos not that good or I am not making sense, super tired and got the pollen blahs still.
Unicorn herding operations are proceeding, but all the totes of hens teeth and barrels of rocking horse poop give them plenty of hiding spots.