I say ride it. Fix the brake bridge, and the buckling under the lug looks more trivial than others I've seen. One of my latest purchases was a PXN-10 w/ a similar buckling - heck it even had some slight cracking in the paint. I saw it before I handed over the money. I handed it over anyway. It was cheap enough, and I thought 'what the heck'. And the fork was straight, and it rides fine. I can understand it bothering you, but few material things in life are perfect (just joking...none are). Have fun and enjoy a vintage Trek