Because that's what's just happened to me and I'm a bit shaken up TBH. We have recently accepted their offer. I am in bed, really not feeling well at all with a bladder infection and the anti-bio's are making me throw up. There's hard knocking at the door, repeatedly for nearly 5 minutes. I ignored for ages and then thought maybe it was emergency so went down and there's our purchaser who starts asking questions. I said I'm not well etc (I'm stood in my PJ's on the verge of being sick for goodness sake, shivering because I have a temperature). He then pushed his way past me in to the house to measure the kitchen. I just sat on the stairs and waited for him to leave as I couldn't handle it. Surely he should ring the agent to make an appointment??? I wouldn't dream of turning up on the doorstep of where we are buying, let alone pushing my way past someone who's clearly unwell in their own home. And he seemed so accusatory asking again "so why do you want to move?", asking to see our original survey we had done when we bought it, but maybe that's just because I was feeling so vulnerable and taken aback that a virtually unknown bloke has forced his way in to my house when I feel so ill . It's not normal is it?