Unfortunately we do not support the old Highland Park combo units which featured multiple grinding wheels and a saw operating on a fixed shaft such as these shown below. While these units were popular in the 1960's and 1970's the main drawback was two fold - the difficulty removing and replacing grinding wheels because they were located between bearings on the shaft and the fact that on some of the units with one motor, the saw blade continued to spin while the grinder was being run causing oil mist to be generated even when the saw was not being used.
The best source of support as well as estimations of how much your unit might be worth would be Tim Larocca at Cigar Box Rock - (541) 280-5574.
Highland Park made a ton of models of this style machine:
And the "F" series units which we don't have any pictures or details about