Some important information is missing. Is it an original Wing, a Head Ski, or an AMF Model. It makes a difference. Look at the Brand Lable. The original Wing will just Have "Wing Archery Co". The Hesd Ski and the AMF odels will have either "A division of Head Ski" or "AMF" below the Wing lable. Given the same condition, the original Wing is worth more than the other two, then it depends on what wood was used for the riser.
Now to solve a mystery. Why in the world would you want to sell a Red Wing Hunter to buy another bow to learn to shoot traditional. You can't find a better bow to start and learn with than a red wing huter.
I suggest you learn on the red wing hunter and then think about buying a bow later on that may fit you better.
In the long run, you would regret selling the Wing. Trust me on this one, I have four Red Wing Huntrs in my collection of over 80 bows. They are great, stable shooters.
In any case Original Wing = $150 or more; Head Ski or AMF = $125 or less. Now thess price suggestions are just the opinions of two guys. A ready buyer may pay more, or less.
One final comment. Suggested values above are for right handed bows. Leftys usually go for less. Just the way it is.