Hardy Boys (#1-20) book lot - all with dust jackets

This is a mixed lot of 20 Hardy Boys books (#1-20). I'm not a Hardy Boys collector, so you'll know better than I what editions these are. All have dust jackets in a similar condition (except one which is worse shape). Seven of these (#3, #7, #16-20) have yellow (or tan) spines, and the rest are multi-colored. All have brown boards. Three (#3, #7, #14) have orange endpapers and the others have brown. Two (#1, #2) are the 1959 revised editions with 20 chapters and the rest have 25 (or so) chapters. I showed pictures of the worst condition dust jacket (#3) and one that is pretty typical of the rest (#15). If you need more pictures or have questions, please message me.