I bought a used 335 a year ago. A person had it on ebay and it didn't meet his reserve, but I had emailed with lots of questions and would up buying it. The setup I bought was a 335 with 300 hrs, 54C, 38" snowblower, weights, chains, etc. all for $5000. You have lower hours, a smaller deck and no snowblower. My guess is $3500-4000 trade and $4500-4500 if you sell it yourself. FWIW, I am located in the west Michigan area.
Most JD Dealers will give you bluebook and trade numbers if you are trying to decided between selling and trading in....