There has been a lot of questions asking what the weight of the blister is. To my knowledge I thought that it was very iffy to weigh blisters because of the inconsistency with the weights between a heavy and light. Is it possible to weigh blisters and determine if it is a heavy/light pack? If it is, would I be able to know the weights? Any help is much appreciated 
It’s possible to know a general likelihood of a holo pull, but it’s happened more than once (and probably more than we know) where the weight of the pack has “lied” if you will. Just post the weight of the pack in your for sale ad and omit any words such as “heavy/holo” or “light”. That’s what I would do.
Unless you know the weights of the other blisters from the case they came from it´s impossible to tell. Generally, the weight range varys pretty widely.
I would never buy and pay a premium for a blister marked as heavy… too risky