The listed price of £399,950 for a one-bedroom flat of 508 square feet with a private garden in this area of London seems reasonable considering nearby comparable properties and the current market conditions. Lack of price per square foot data for comparable properties makes accurate judgment hard, making the price fair, but not extraordinary value.

Based on the provided images, the property appears to be in fair condition. The exterior looks well maintained and the garden is tidy, but the interior shows some need for modernizing or updating. While structurally sound, cosmetic improvements and some kitchen/bathroom upgrades could enhance its overall appeal. It does not look run down but needs modernising.

The property is located in the Walpole area of Ealing, West London. While not central London, it benefits from good access to transport links (West Ealing station is under a kilometer away), several well-regarded schools within a reasonable distance, and local amenities. The area itself is generally considered a desirable residential area in London, but may not possess the same level of prestige or convenience as more central locations. This scores it highly but not perfect

The property includes a private garden, which is a significant advantage in London, particularly for a ground floor flat. The size isn’t specified but the images suggest a relatively decent-sized space for outdoor use which is rare in London. Though smaller gardens are quite common in the area, the presence of one still increases the desirability and value of this unit.