Yuri, I've sold quite a few DR's myself. It might be helpful if you mention if these are NOS or used, and if they're used, how many hours do they have? It's also good to mention if these are matched tubes & if so, what was the testing criteria and how tight were the matches? Are the measurements included? Finally i'd add where you bought them from (ie: from a tube store or private seller). GLWTS!
Cheers,
Bodhi.