Where i like this house would at least £600k but obviously, as PP have said, you need to see what other things are on in your area. Ultimately, it comes down to price.
However, I don't think the photos are amazing to be honest. And I agree the outside shot doesn't help. It took me a while to work out that that was your neighbour's house and I spent a while wondering how they get in to their house as it's doesn't look like they have a side path. That could make people worry about access?
I think photo 5 of your lounge makes it look very long and narrow. Photo 9 should come way after other pictures of the bedrooms - it implies this is the 2nd biggest room but I presume that photo 11 is the double on the first floor? Photo 10 looks like someone was standing in the cot to take it! And photo 14 almost looks like something someone has taken by mistake.
Having read the way the description is written I might also worry that the agents are a bit annoying (or more annoying than usual). Do they have a good reputation? There's an agency in my town that I would never sell through and would only consider buying from them if they had my absolute dream house.