FWIW...I found this listing of realized prices of some of the EK items:
THE KEITH SIXGUNS ARE SOLD! | Single-Actions
I do see a few bargains in there. The 1877 Sharps Long Range rifle I coveted went for $23,000...not a bargain!
Look closely at Peter M. Eick's avatar. It clearly shows one of the ".38-44 Spl." headstamps. Not all of the ammunition manufacturers were so careful to stamp the heavily-loaded .38 Special cartridges with its own specific ID. Not even all of REM-UMC were so stamped! Many were simply stamped...