Probably not. The tennis balls collectors would slam your collection and tell you to go collect coins.
Probably so, if I just have some beat up can, unsealed, no name, no bounce dirty tennis balls to show. But, if I come with a pristine can of Spalding or Wilson unopened pure angel white tennis balls, I am welcomed into the world of tennis ball collecting.
And a lucrative collection to soon follow, no doubt. You'd have to slab them though and then the Chinese fakes. It would never stop.