I have three of these available. One has only been used 2 weeks with a build date of May 21, 2019 and has not been registered. The other two have been used about 6 months with build dates of August 1, 2018. I'll do the newer one for 385.00 shipped and the other 2 for 350.00 shipped. Each will include a diffuser and RMS mount/slide for attaching it to the Radion rail. They all are in perfect shape and function as they should.