I'm having a little problem with deadbeat sellers who A) overestimate their abilities and B) don't get back to you.
What's typical is bragging that they can do this, that, and the other thing, then when you send them the sheet music, they choke and don't get back to you.
A lot of sellers seem to be self-indulgent wankers who want to do their thing on your music, but can't produce when they're asked to do something specific.
Speaking as a former owner of two music studios, I expect musicians to be transparent and up-front about their abilitities or the lack thereof. That hasn't been the case so far.