Elna Capcitors? Does anybody collect or refine

Hi everyone, I'm new here and to the e-scrap community. I was just wondering around the house and came across alot of older computer electronics and other electronics as well. I have come across some Elna capacitors 2200 uf(M) 50v, does anyone know what these are made of or sell for as scrap? was wondering if they may contain tantalium, they're pretty big in size and came from an old Luxor satellite receiver I have looked into. Any suggestions would be nice. I have looked on Ebay, they are on there, but don't look as though they sell very well or at all, they are from the 80's if anyone is interested. Also they are for the big old satellites fiberglass or steel mesh ones. Anyway good to meet everyone and hope this is the right Forum to get started scrapping...Thanks, Eric