Pro tip: the old timer at the swap meet in Abilene said to check my anvil with a hammer tap before buying
I rolled my eyes at first because who tests a 140 lb anvil with a tap, but he said listen for a ring that dies fast and that means a crack or bad weld. Turned out the one I almost bought had a dead thud on one end and I walked away, saved myself $300. Anyone else got a quick field test they actually trust when you're buying used iron?