Looks to be a Graco model. Should have door trim to match the bench. Check out the Graco section at www.servicemerchandisers.com. It will have answers to all of your questions.
Having purchased an old work station this last summer and searching the market for a few years prior to that I’d say $850 seems pretty reasonable for it in that condition.
That one is double the price without the side cabinets? That kind of pricing would be more in line with what I usually expect to see from people that know what they have and are selling to collectors. It’s a tough market. These don’t come up for sale everyday and when they do surface there are usually people ready to pounce.
You should send me a PM. I am in MN also and have my ear to the ground for this kind of stuff. I will keep my eyes open on your behalf. I should get your contact info incase I find something.