How many miles are on those trucks ? Sounds like the owner about got the most productive miles out of them and is unloading them before major repairs start popping up . If you want to get in the business do it firsthand as a driver yourself either for a fleet owner or with a newer truck of your own . In either case team with an experienced driver . Once you get a knowledge of the business you can put another driver in your place on the team . From what you said , these 2 trucks have solo drivers . You really should have teams in the trucks for maximum profit .