You should put more pics in your auction, interior, engine etc etc, people are having to bet on the completeness of the vehicle, and they will bet low if they cannot see things
WRT chassis repair, the original Elan was a no repair possible chassis from 1963, with a similar chassis cost/vehicle cost ratio, so this is not news, and many, myself included have repaired those.
In the end replacement is always better[as the OP has decided]
It is frustrating as the Elan was not so prone to accident damage as the wishbones are weaker than the chassis, and mostly I have seen broken pins not bent chassis. It would probably have cost 10 pounds to make replaceable suspension mounts, but the cars are made to a price point.....