Looking at buying a 2001 Silverado

[trappermat]

So, i recently test drove an 01. All of the mechanics seemed good, but there was a little vibration at 65+. Could that just be the tires? It also is just starting to bubble over the rear fenders. Any good ideas to stop that and make it look nice? I am already planning on putting fender flares on. Ok, one last thing it has a few rock chips along the side, are there any simple inexpensive fixes to keep them from starting to rust? Clear coat the whole thing again? How much would that cost?