NAD 3020 What to do with it ???

Hi Folks, I have just joined and this is my first time here. I have an NAD 3020 I bought in 1980 (I think) and has been in constant use since then. No longer need it as I have gone a bit nuts buying new equiptment this past year. It has some dirt in the volume pod (crackles a bit) and some other switching but works good still as far as I can tell. What should I do with it?? It must need new caps or some type of refurbishing at 30 years + and I only paid $200.00 for it. Is it worth it to spend any money on it or should I just pitch it, seem a shame as it still works fine. Thank you any and all that respond to this. It is appreciated!! Cheers, DMacG in Canada