Offer 300K. She won’t go for it, so what would you have to loose. Don’t offer anymore than 300K, because prices are going to come down anyways. If you like the property and can afford the 300k, it’s sounds like a win/win situation. If she does go for it, list it immediately for $430K, if it sells pocket the money and rent for another couple of years and buy again for $300k or less.