The damage reports indicate that the gear leg snapped or broke off during the ground loop (this airplane has been damaged three separate times in the past and has incomplete logs). That looks like the 140 gear, which is normally much more robust than would normally be required. Unless the gear leg merely separated from the fuselage due to a broken or missing mount bolt, there had to be something wrong with the gear leg, such as chemical embrittlement, work hardening from straightening or re-arcing, or a pre existing crack. I've seen them bent, but never broken!
Of course this airplane is rebuildable, but it should be gone over with a fine tooth comb and all previous repairs and modifications verified as complete and proper. The O-320 will need to be overhauled, and it's likely the crankshaft will need replacing. There is at least some additional damage in the right hand gearbox area. I do not think it would be an economical project for anyone but a mechanic specializing in restoration, unless the winning bid is well below normal salvage value.