Welcome -- if you want to post for sale, you need to be a paying member, but the subscription is not expensive. After you post ten times (meaningfully, not nonsense posts), then you can post photos -- it's an anti-spam measure.
When you are a little more active on the forums, there is a valuation forum here where you can ask for advice as to value:
https://www.bikeforums.net/classic-v...th-appraisals/