I've been replacing the paper envelopes for plastics ones, would that be a good practice?
I think they are better preserved that way, but you are the experts, please let me know.
I have also these already on ebay, just to make a test ans see how it goes

and what can you tell me about this one?

I'm sorry for putting you guys to work at this time of the day, I've been told in here that you guys like pictures, well, I'm just warming up :P
Thx!
Bob