I am buying a second hand frame (Dawes 201 hybrid) build up (first time doing that, so exciting).
I'm paying cash on collection, so can back out if anything looks wrong. What should I look for on the frame to make sure it's up to scratch?.
If the bike had a serious crash, the frame will have a deformation where the down tube joins the head tube. Since this is usually hidden from view, inspect this spot.
Most other problems, like a worn-out bottom bracket or a cassette that needs replacing, can be fixed - a damaged frame can't. Of course, you still want to notice these problems to factor them into the price.