IMO that's not much of a deal.
In the fall I was in my local Sears in September. As I was walking out the store, The sales associate asks, "Are you looking for a snow blower? We have one heck of a deal here let me show you the snow blower on the ipad display."
He shows me what the snow blower looks like. Then says, they found a huge bunch of brand new three year old snowblowers in the warehouse that were never sold. They are clearing them out at a great price.
He gets on the register, punches in the SKU and it comes up for $379 before taxes. The newer models on the floor have some autosteer function and heated hand grips for $799. Since I had a single stage Ariens which works when it's a light snow, but isn't self propelled I jumped right on it.
Now that's what I call a deal! When I picked it up it was brand new with all the protective plastic all over it. I gased her up and she fired on the first pull.
Ariens makes a good machine, but I think you should offer him $500 first and maybe go up to $600 max. Prices of all that equipment have come down. I realize Ariens is American made, but is it worth that much of a premium when it's used?
Regards, JC.