Found a 1970 Dart Swinger, what's it worth?

Well, I committed to buying it and picking it up on Sunday, so here goes the beginning of my first long term project of this source.
Since the seller already painted the cab, engine, and trunk compartments Plum Crazy, that's the color I'll probobly end up with.
Since this is all new to me, I hope all who have the time and are willing, will be patient with me with all the questions I'll have here going forward, so thanks ahead of time!