The rare and good looking Sinclair PC200 from Amstrad's short-lived Professional Series was a standard, reasonably priced and a bit behind the times IBM PC-compatible computer released in 1988. It tried to compete with the Amiga and ST and thus came in an all-in-one case with 512k of RAM, a pretty fast 8086 CPU, a 3.5" disk drive and, sadly, CGA/MDA graphics. Not surprisingly it flopped and is nowadays highly sought after.
Interestingly, you can grab a Sinclair PC200 off of eBay. It seems to be in good condition but is untested. Seller ships worldwide.