The new HD are by all accounts better. Out of all the HD binoculars I sell , I get more possitive feedback on that particular HD binocular compared to the prior 2 versions of the non HD 15x56 - older light green and the NEU's
If you want to know the current market for your 15x56, you can call or text me at 512-431-6775.
Thank You
Larry Chapman
TexasBINOman.com