This is a frequent issue for people who sell content on their main accounts and I believe may be a vector towards further harassment after blocking. You block someone (and this could be for any reason), and they aren't able to purchase/obtain content from your marketplace.

I could block someone because I find them insufferable, but I may also want their business. Blocking someone leads to a situation where this is impossible.

Sometimes this leads to users tempted to reach out to you on an alt account to resolve the issue, nullifying the point of blocking them.

I think the marketplace should maintain a block list separate from Inworld (similar to Caspervend vendor bans) so that users get autonomy on this.