Luxury designer resale/consignment assistant

Looking for a fashion consignment ninja with experience buying and selling luxury designer clothing and accessories online and locally. Must have experience selling successfully with eBay, FB marketplace, Poshmark, Vestiaire and know how to get best price for items. Job is flexible, mostly remote and paid hourly plus commission on sold items from individual collector. Respond with experience and an example of a high priced item ($1000+) that was sold for optimal value and how it was accomplished.