I bought a Sheldon lathe from a gunsmith a few years ago and now I need to sell it. Its been stored in my shop for 9 years and never used. It's a model ER-72-P. I believe it has a 15 1/4" swing and 1 1/16" collet. The day i bought it, it chambered a barrel, and has been in my shop since. I have no idea what it's worth or where to try and sell it. Any help would be appreciated.