Couple questions about an inherited collection
Helping a family member with a stamp collection passed on to them, I have been very honest that most stamps are not worth more than a couple cents wholesale. These two from what I'm seeing appear to have some value. I know coins well, but stamps are a new area. Is there value in getting stamps professionally graded, especially these two that might be worth something? Additionally, I know the spread on stamps from wholesale-retail is impressive, how would you recommend maximizing value for time spent.