Are DEC TK50/TK70 tapes worth hanging onto?

OK, I have a fairly large collection of VAX 4000 and VAXStation 3000 systems which I have fun with and use with both OpenVMS and OpenBSD over the years.... But, I also have two big rubbermade containers (about half a cubic meter) filled with TK50 and TK70 tapes which I have never used. Some are blank, some are the boot & install media for VMS 5.5, some are software installations, etc. etc. In the past 25 years that I have had them, I have not once ever used my TK50 or TK70 drives...I've always either booted off the attached disks or netbooted. Should I just throw these things out? Do any collectors consider them to be valuable? Since it's now 2016 and I think the last TK tapes were made in the 1990s, I'm getting the urge to toss them. Opinions? Comments? --------------- Thomas "PDP-11" Dzubin Vancouver, Calgary, or Saskatoon; CANADA