You need to decide if the amount of time to clean them up, rebuild, and such is worth the price. I would be concerned about that drip tray. If it's not brass, then it's just NASTY.. Also, if you have a place where they'll look good once cleaned up.
Would you put a protection coating on them, or let them tarnish/patina again?? There's something to be said for a nice patina on brass items.