bearisgray, a lot of people use Ebay, Etsy and Facebook to sell items they are ready to part with. I'm sure when you are ready to pare down or completely destash, possibly have a pre-estate sale or auction. I don't think you'll ever get close to what you paid. but, you could try. Even a "garage" sale specifically for the sewing enthusiast would do the job.
You don't have to donate or give away your stuff. It is possible to sell anything you want to.