Star Wars lego sets which one to choose 75 different

Carden2709 · 2015-03-05T01:55:16.000Z

I know a guy whose selling opened but mint Star Wars sets with the box and instructions. He has about 75 different. I'm really new at this and was wondering which older Star Wars sets would be a good investment. His prices all really fair. Or should I stay clear of the opened sets and stick to NIB. Thanks for the help