YEOW!
That baby is RARE INDEED. TOL keyboard Spacemaker 30s are rare in any year, but I've only ever seen one other of these, also in a photo.
Interesting that GE had already gotten the message about needing two large burners on a TOL 30-incher, not just one, as earlier Spacemaker 30s had. That was not a cheap change to make; it required a whole new, hideously expensive die to stamp the new cooktop. This range has Sensi-Temp, the rotisserie and the meat thermometer. I have not seen one of these in person, so I don't know what the griddle setup was like, but that's Sensi-Temp instead of Automatic Calrod, so perhaps it just had a griddle that sat on the Sensi-Temp burner, the way my 1972 J 370 does.
Well worth the asking price if it looks this good in person. Especially if the Sensi-Temp still works.