Some like to keep their vehicle stock. The endcaps of the roof rails easily break off. People will pay $ for these endcaps. Takes effort but if you keep an eye out you can find people who will pay good money for old parts.
Are you talking just the bars or the bars with the factory tracks? If you mean both, there's a bit of value. If it's just the bars, not much as the others have said.
I sold mine, bars, tracks, end caps, everything for $120 on Ebay. The sell for upwards of $150. If you're going to trash it put it in my trash can please
I've taken my roof cross bars and roof pads (the members that run width wise of the car along the roof) if anyone wants them. PM me. I'm bay area. No need for them.