An important part of building a consignment store in the luxury space is building trust. No matter how much money you spend on social, and advertisement no one will buy unless, you content works on building trust between you and the buyer.
I would love to chat and help you out, if you do have this problem. You can reach my anytime at: email@example.com
Dont give up so easily. It could be something that you have overlooked or maybe you need to optimize your ads. What is your url so that I can take a look at your store. A lot of times it just take being persistent and having patients.
Web developer/Graphic Designer firstname.lastname@example.org