It all went down in the notoriously expensive Hermes store -- where we're told Kim and her mother Kris purchased six of the label's exclusive "Birkin" bags ... valued at around $10,000 apiece.
But here's the kicker -- sources close to the reality star tell TMZ, Kim also bought herself an extremely rare crocodile-skin bag from the upscale French boutique ... with a price tag of $30,000.
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