It'll be annoying as hell wondering if this domain might've been your lucky boat coming in to port, but yes, as others have indicated, it's technically
breach of contract.
The seriousness of the consequences would depend on how badly, and what means the buyer had at their disposal to get all legal on yo @$$ Wouldn't hurt much to email Sedo about the scenario, but they certainly won't be pleased to lose their cut of the cake, which I'm afraid is going to be a huge share of it, if my guess you listed it for a low amount offer is correct. You can thank their new 'improved' fee structure for that _\|/_
However if the buyer's username is 'Halvarez', you wont have to worry about him at least - that person will not be in the mood for court proceedings, I can absolutely cast-iron-moneyback-guarantee it :ghost: