An update ...
Oh, just in case anybody cared how that situation with the "substituted card" ended up ...
I opted to leave a "neutral" feedback:
"Rare 21/82 sent instead of listed HOLO 4/82 - claims to not know the difference!"
I felt that pretty much encapsulated the situation ... while warning others that the seller might not have a clue what he's putting up for auction!

I opted to leave a "neutral" feedback:
"Rare 21/82 sent instead of listed HOLO 4/82 - claims to not know the difference!"
I felt that pretty much encapsulated the situation ... while warning others that the seller might not have a clue what he's putting up for auction!