They tend to highlight if there is no chain because that's a selling point. Likewise if you're looking to buy and have no chain (e.g. you're renting) it's worth

They tend to highlight if there is no chain because that's a selling point. Likewise if you're looking to buy and have no chain (e.g. you're renting) it's worth mentioning it to the agent as that also makes you a 'good' buyer. Also perhaps if the chain is in place apart from finding a buyer for the advertised property (i.e. seller has already found their next property, etc) because, indeed, that means that the seller wants to get on with it ASAP.