I just bought an original picasso sketch. He did a bazillion sketches a day and some of his original quick sketches you can get for as low as $500. It came with a COA and bought from a reputable dealer but unless it is certified by Picasso's daughter, Ill never truly know if it is in fact real.
He would do hundreds of the same sketches. Mine is almost like this (^^ this is a print not original), he kinda smugged the lips a bit and the horns are sloppier and mine he put a border type thing on it.
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Sotheby's is currently doing an auction.
https://www.sothebys.com/en/buy/auct...icador-a-r-176
^^ you could probably get this original ceramic bowl for about 1k us dollars.