Bella, whose father is worth an estimated $570 million, put an enticing tagline on her page stating: "Everything must go. Free postage within the UK. No refunds. Not responsible after postage."
It looks like she is in it for the money too, with many items priced above what they are worth - some tops are marked up by $85.
Tellingly, the Scientologist is using the same profile name that she's used for her private Instagram for years - @beezwell.
Bella currently lives in Croydon, just outside London, with her computer programmer husband, Max Parker, who she married in 2012.
She was adopted by Tom and Nicole in 1992 and her younger brother Connor, 25, also a practicing Scientologist, was adopted three years later.