Unfotunately, the market has moved on so, as it’s been stated several times, if it’s not 650B/29, tapered head tube yadda yadda yadda then it’s not very desirable anymore. That’s not to say that the new stuff rides any better but fashion is moving on. Of course, this means that people will probably pay a LOT less than it’s worth to you. Exactly as Tomaso says, if you don’t want to drop the price, then keep it and rag it until it breaks.