Offers are many but here is a unique offer.An advert for a house in Indonesia has gone viral online after the woman selling it offered to throw in an unusual extra feature for free -- her hand in marriage.The Internet ad reads for the most part like a regular house listing, saying that the single-storey property has two bedrooms, two bathrooms, a parking space and a fish pond. But it also proposes to buyers a "rare offer" -- "when you buy this house, you can ask the owner to marry you", alongside a picture of Wina Lia, a 40-year-old widow and beauty salon owner, leaning against a car in front of the house.The house in Sleman, on the island of Java, is on the market for USD 75,000.News of the offer quickly spread among Internet users in social media-crazy Indonesia Boldies99, a user on popular online forum Kaskus, said Lia was "quite smart -- even though the house will be sold, she will remain the owner.