I passed up a chance at a 60 watt MkIII blue stripe for $700 in the mid-2010s. I needed some TLC but was functional. Before COVID, MkIII's of all stripes could be had in DRG format for $1,000-1,200 depending on condition. HRG's were similarly priced, sometimes under $1,000. MarkIV's were $900 to...