What to do with old Spectrapure CSPDI -80

Hi,
I haven't been on this group for a long time, at least four years, I thought
there was a marketplace group too but I couldn't find it. If there is a
different newsgroup for selling stuff please let me know, and I apologize
for listing it here.
Anyways, when I gave up my reef pursuits almost 4 years ago I got rid of all
my aquarium stuff except for my Spectrapure CSPDI-80. I've been cleaning
out the basement and actually had my hands moving this to the trash. Then I
thought it must be worth something to someone. The manufactured date is
12/99, I used it until sometime in 2002. I had a topoff kit, which is gone,
I do have the small plastic tank and some tubing. I was on a city water
system so the water was pretty good to start. I never took the water out of
the canisters when I shut down the system.
Is this thing worth anything?
Thanks,
Jeff