For what it's worth, there are several reasons that sets and props are routinely thrown away.
First, it would take labor and time for someone to set up auctions or arrange fire sales for all of the thousands of props on the thousands of shows that are shut down -- and the money potentially earned on behalf of most productions would be so minuscule in the bigger scheme of things that it is rarely worthwhile. Plus, production entities don't usually keep someone on staff after a show to do such things. When a show shuts down... it is down! Close the doors and turn off the lights.
Second, liability has become a big issue in the production world. On the extremely slight chance that somebody bought a prop and then got hurt somehow from it, the production entity or television network could have a lawsuit and/or a PR scenario on its hands. It sounds completely stupid, but it is true. Certainly a bridge prop is completely innocuous. But somebody somewhere could potentially claim lead based paint or maybe cut their finger on it and have a tetanus bill... who knows. Again, it is stupid. But we have become a litigious society and the television entities are hyper vigilant about such things. I've had to throw away an incredible amount of amazing and expensive stuff simply for liability reasons (I work in the business).
And lastly, the network doesn't want a very visible and known prop such as this one showing up on some other television show. Some exec somewhere probably wants it to either be museumed or destroyed. Unless World Wide Pants decided themselves to auction it off for charity or something very visible where the item would have an implied pedigree, it's unlikely they would just sell it to Joe Forum Member. Then again, I will bet that a lot of props that were supposed to hit the dumpster somehow magically end up on some Grip or Gaffers' mantlepiece at home. Kinda like that guy in the photo loading the item into his car.
- timbo