Actually it's been easily possible for years. Just forget about buying new equipment and buy older Tektronix or HP sampling scopes on ebay. For eg the HP 54121T

Actually it's been easily possible for years. Just forget about buying new equipment and buy older Tektronix or HP sampling scopes on ebay. For eg the HP 54121T, a 20GHz scope with TDR, able to characterize trace impedance absolutely workably for modern motherboard applications. I got a perfectly functioning one on ebay for $600. Also you can get the service manuals, which you can't for more recent equipment.