Have her get it up and running and drive it. Put new tires on it to be safe, & store the old ones. Keep all the old parts and paperwork. Once folks see it, they will probably approach her and ask if she is willing to sell it. She needs to have a number in mind that she is willing to sell...
That thing is a cream puff. It needs to be kept as is, or if there are changes made, keep the old parts. It looks pretty original. With 49k miles on it, some service items have most likely been replaced. It needs to be treated and kept as a classic car. Find and keep all the old paperwork...