Personally, I don't think the pipes themselves are worth bidding on. But these days you could pay more than $20 just for the rack alone. If you can get the whole deal for under $25, I think it's a relative bargain. But I honestly wouldn't expect much from the pipes themselves. (And given the fact that they're not "name" pipes, I'm guessing you're going to find them in pretty bad shape. But that's a personal bias of mine: In my mind, folks who care enough to take care of their pipes will likely care enough to invest in good pipes.)
Bob