If the bike is in really good condition hold onto the old BB so that if you get vintage bike mental disorder you can re install it and brag about being old school. Alternatively you might be able to buy a really good fixed cup bb like shimano 600 ect. off ebay that has seals and install that. I have even read about driling a hole in the BB and using it as an oil port so you would never have to replace the BB (but would have to oil it), now that would impress your friends.