Maybe just put it on here as it is, for a low price, or as a free model?
You can never know how someone is going to use it, maybe for testing out some rendering tech while in a learning process or something, hoe knows? If it just sits on your hard drive then now one really benefits from the work already done.
You can actually update the model whenever you have time and motivations to do so. When people start downloading (even as a free model) you will probably also feel more motivated to work on this project as well?
For example, I have this Core model, it was relatively basic but still just uploaded it, to my surprise it actually sells so I made an extended edition and kept the old one also up for sale, now both of them sell.