10 to 20 years for me! Got first Pin in 2000...but have been playing for way longer (met hubby in an arcade in the 80's)! Still have that pin but they are kinda like rabbits...they seem to multiply!! Once they are added, they seem to stay!! I don't buy em to flip em!! I buy em cause I want em and once I restore them it is hard for me to give them up!!
Long time RGPer before coming over here.
Phoebe