According to my 2005 Blue Book, it was in the 1974 catalog.
Values:
98% perfect - $685 (Used, butt otherwise like new.)
90% - $510 (Straight, but some wear from lots of use)
70% - $310 (Noticeable wear, slight warps, but still playable)
"Poor" is too vague to use as a definitive condition.
I played with a Viking back then and liked them. Had an X90 and then a Z140.