The LA one is serial #1781, built in 12/76. Hope somebody can save it, the thing might actually polish up nicely once all that dust is removed.
I'll have to check into the Colorado one, the photos seen in the ad come from
this old web page, where the person had an extensive HAM radio setup built into the rig. Last I heard, it was in Arvada CO, so I assume this is the same rig. Never was able to get the serial # / build date for it......