The KEH Road Show will be visiting Denver on May 23rd and 24th, to purchase used camera gear;
https://www.facebook.com/denverprophoto
At Denver Pro Photo, 800 South Jason Street, hours 5/23 9am to 5pm, 5/24 9am to 4pm.
In addition to hosting this event, DPP is about the only place in metro Denver to sell new Pentax DSLR gear, as well as virtually everything the digital or film photographer could need. They also have a camera and lens repair shop, Ray's Camera Service, attached to the main building.
So, dust off that unused old gear and bring it by!
Ron