Andre,
Regarding growth and popularity, I joined the club 2 yrs ago, since that time membership has grown about 18%. While not astounding, to me this is fairly healthy.

Regarding investment and recovery costs, We always have to remember the first rule of any collectable. Buy because you like it not because you might make money on it. There are those that do it strictly for the money, they stand to lose the most. If you keep the hobby within the relm of enjoyment and then make money in the future, you win both ways.Another rule is never buy more than you can afford to lose.Just one chippers opinion. Hopes this helps you decide.