1980 Delta 88 Royale sedan questions

[Jasondoesitall]

Seeking help getting market value of our Olds and any help would be great. I've included pics of the car and the door sticker for data Information. Any and all answers would be great!

 

[Olds 307 and 403]

What engine option, accessories and mileage? Those are great cars but like the G body, very limited market and only a few will pay anything for them.