Original StingRays are actually worth a fair chunk of change.
A quick scan through Google had several listed for $250.00 + (even in marginal condition, they were getting well above $100.00)
If it's a "Krate" (Orange Krate, Apple Krate ...) it can be worth quite a lot.
Your other option, if you want to go through the trouble, is to sell it in parts, which would probably get your more money, but you'll have more time invested.
A guy I work with found a ~WWII era Schwinn (with the fake tank on the bar, headlight ... big ol' clunky thing) while cleaning his parent's garage. The guy at the bike shop offered over $2000.00 in fair-to-bad condition. So Mike had it restored ... it's s'posed to be worth $4500-5000.00 now. He even paid a guy with the original "Schwinn" leather stamp $250.00 to put the (original) logo on the new seat.
Now it looks so good he doesn't want to sell it ... and it's worth so much, he doesn't want to ride it ... so it hangs on the basement wall.
FWIW
Scott