You can withdraw an offer, it's not a problem as long as you're not at a public auction. Look, if you want to put an offer on a house, just do it, if the auctioneer thinks you're genuine he'll be back to you. People can talk about strategy, etc, till the cows come home but the house will be sold to the highest bidder or the one who can complete the quickest. If you happen to be bidding in Dublin, the property will usually exceed the asking price fairly rapidly. If you want it, like it, set your heart on it, then go and put the asking price on it and you'll soon know where you stand. As I said you can always withdraw the offer before signing anything. Don't do it too often, they'll have your card marked, they're not as thick as you might think!