if it's had a crash there is a likelihood that the top tube and the down tube are going to have been damaged and possibly the forks as well. it's almost impossible to tell without sandblasting or x-raying the frame. any frame builder would be the best person to advise but i wouldn't waste yours or their time to be honest. the frame will probably be fine for light use or pub bike use. who knows though. not me.
if it's had a crash there is a likelihood that the top tube and the down tube are going to have been damaged and possibly the forks as well. it's almost impossible to tell without sandblasting or x-raying the frame. any frame builder would be the best person to advise but i wouldn't waste yours or their time to be honest. the frame will probably be fine for light use or pub bike use. who knows though. not me.