It is worth what someone will pay. I know, no help but, that is the reality. I would take a look at Keh.com and search for the pieces you are trying to sell. Should at least put you in the ballpark.
I bought a Nikkormat FT3 (a little older than the EL) with three lenses, flash and a case for $80. Look on eBay, KEH (as mentioned above), B&H and Adorama used shops.