I think I'd still like to have a Jericho 941 someday.
I own a Steyr GB and it's nice. Mags are rare and expensive, but that's really the only downside.
Never seen a Mateba for sale in person. Seen plenty over the years on Gunbroker and the bidding was always brisk.
With Gunbroker and the various auction houses (Rock Island, Morphy, etc.), pretty much anything is accessible if you are willing to spend the money.