Mentioned it in my last comment but they are literally the exact opposite of what you want for money laundering.

You want to be doing hundreds of small cash transactions a day with the possibility of cash tips, not have a store where your entire inventory is on a spreadsheet and you sell two of them a month through well documented credit card transactions for prices you advertised in a full page newspaper add that went to everybody in the city.

You can't just "misplace" an $1800 item very often without getting flagged.