Well, the prrof of the pudding is in the eating! If the RIB sells, then the reserve was not too high. If it doesn't, then it was!
Anything is only worth what someone is prepared to pay for it and if you can find two people that want it enough then the sky's the limit!
So keep your fingers crossed that it does sell, 'cos then you'll have a nice valuable rig sitting in the garage or wherever!