4 Fiats, 1979 X1/9, 1980 Bertone, 1983 X1/9, 1985 Bertone

I am attempting to sell of some of my fathers old vehicles. I know very little about them, or cars in general, but feel free to ask questions and I will answer to the best of my ability. This lot includes FOUR fiats, listed below. I was told that the best thing for someone to do would be to pick one to fix up and use the rest for parts cars.
1.) 1980 Bertone (solid red) (clean title)
2.) 1983 X1/9 (Silver) (clean title)
3.) 1985 Bertone (red & black) (I have a title for either this one or the 1979, not sure which but will update when I dig the title out)
4.) 1979 X1/9 (goldish)
Again, feel free to ask questions, I will answer to the best of my ability! Thanks for looking!