So sk, did you get the grinder? There are many people here that paid all kinds of prices for these grinders, but being not too far removed geographically I'll give you some examples of what I've paid.
I bought this 1965, 1/3hp 397.xxxx model for $10 with a noisy bearing. Note it has both original eye guards intact, but the rests are badly worn.
Untitled by
Fyrme, on Flickr
Then restored it and sold this for $100 on CL. I only had about $30 ******* in in but the labor involved well exceeded $70. So consider that.
Untitled by
Fyrme, on Flickr
I also bought a 1967 1/2hp model with the lamp and good eye shields in overall good useable condition (to me that means very good condition and it doesn't need restored) for $50. Sorry no pic.
I paid $75 for this 1958 1/3hp model with original pedestal and missing one eye shield but otherwise good condition.
Untitled by
Fyrme, on Flickr
And finally, I bought a "true style" 1/2hp block grinder from the 70's for $40 and cleaned it up and sold it on ebay for $105. It was just like this one that belongs to Mickey O, her on the GJ.