I keep about 50 props of different sises in my box. Before any props get there it has to be checked for balance. Most of those props are APC for my two and four stroke engines. To date I have only found one size of APC prop that is almost always close to perfect. Some of the sizes are way off clunckers and need A lot of help before they get into the prop box but most of them are close. Like CGR pointed put, just depends on how close you want them. I want them dead on but that's just me.
I had A friend that figured removing the price tag was close enough for him. I showed him how acetone would remove the tag glue and he was thrilled with that new methoud.