It was expensive. In 1987 I built a 386-25 with 16MB RAM and SCSI HD that ran Interactive Systems UNIX for a lot less than it would have cost to get a Mac II with A/UX.
Interactive still did beat SCO/Xenix on price in 1992 for running Oracle (on 386 hardware that costed as little as a single 857 MB hard disk on RS/6000 with AIX). And Novell 2 or 3 sure did beat A/UX as AppleTalk file server.
That was using socketed DIL chips, 8MB on the motherboard and another 8MB on an expansion card. I had to insert the chips individually into the sockets. I had mis-remembered the disks, it used ESDI not SCSI.