worth of '74 OR80

[Richard Prall]

hey, kids... need some help figuring out the value of my '74 OR80 head and it's accompanying 4x12 cabinet w/original Fane speakers. i've used it for touring and it has some cosmetic wear on it, but other than that, it's a beauty. there's an after-market master volume on the back, but that's the only mod. if someone could clue me in on what it's worth, i would really appreciate it! thanks ~dp