I'm about to put an offer on a house that is advertised as offers over (Scotland) £300,000. The seller has been in the house for two years and paid six thousand less. It's been on the market for 5 weeks. I have no idea what to bid! I hear it's best to offer way under the asking price but how do you know how much? I've not much idea what I'm doing! I've got an offer on my house.