Another way of looking at this is through the lens of history and inflation. In 1969 a set of Drake twins (R-4B, T-4XB, MS-4, AC-4) cost $1149.85 (in the 1969 Lafayette Radio catalog). That translates to $8136.60 in 2020. I daresay that the K4's features and performance are just a tad bit better. ;-) 73, Chris, W2PA