Found a complete, used one of these in a used Star Wars lot the other day... and this might actually be the first set I find that is too cumbersome and awkward to display. As I have a ton of room in my office, I usually display all of my completed sets but... I don't see the interest in this one.

 

The "Bat Tank" might be the worst vehicle that I've seen... but do people still have demand for the Batman I sets like this one? Not sure what to do with this set...

The first run of Lego Batman are VERY popular, including this one.  I would list it on eBay.  Do you have instructions, all the figs for it?  If so, you could have a nice score.  BP price on this is $130+ used.

Thats a pretty sweet find. If you don't have everything, you could part it out as well.

If you don't have everything to create the tank, you'd be far better off getting the remaining pieces from BrickLink than parting out what you have.  This is definitely a case where the whole is more than the sum of the parts.

Everything is there, minifigs and instructions included. The instruction book looks mint, not sure they opened it more than once.

Just need to replace the navy cape for Batman and verify all of the links for the tread are there.

Double checked, it's all good.

Might wait to see how the classifieds work, need to build up my HP stuff and maybe someone has some extra their willing to trade for some of my Batman I sets.