Hard to know whether this will put you in a better or worse position. I know someone who bought two flats from the same company and asked what they could do if he bought both. He ended up getting them cheaper as he was buying two. But they were newly built so a different situation.

It’s always worth a try to go under the asking price – you don’t know how desperate they are to sell and what they might accept. Never go for your limit though, as they will always try to talk you up – always leave a bit of room for negotiation.