I don't know if I should post their name here to warn other Blabbers, but if I see them pop up on the transactions group again in a negative manner I might. I wouldn't say they are harmful just a waste of time.
They promised to pay over a week ago on a specific date and failed to get in touch with me for over 7 days.

(I admit I've fallen out of contact with some people but I totally accept the seller moving on etc... except once but that is not a story for this thread today. )

I have moved on to better people to sell to and won't bother with them again.