I have had this for a few years and really never had use for it. I do most of my readings by eye. Years in the photolab business and knowing what I wanted in the first place. This unit works just fine, real simple reads paper and film. Its a lot smaller then ones I had to use in the Pro labs but its very accurate. I'm asking $30 plus shipping for it. A great price! Connect with me via PM or use my personal email firstname.lastname@example.org. Paypal but personal check or Bank money order would be prefered. That way I get the funds directly. Thanks!