as has been said the issue will be the agent. My mate made an offer on a £120k house of £100k, agent laughed and said 'you'll never get that house for £100k'

The agent comes back and say 'sorry, £115k is the lowest'

So my mate calls round the blokes house and asks if he could have a chat about the offer he made...'what offer' replies the guy!! Between them they settled on £102k, the agent called my mate ranting until it was pointed out that he had not put the offer forward, he then shut up.

Try and meet the seller (evening viewings will give you more chance). Chat to them and find out...

when they bought it - was it alot cheaper back then? maybe have £££ profit so more open to lower figures for a quick sale?
where are they moving to? are they in a chain or desperate to move? if so, maybe they are more willing to take a lower figure from a deffo sale?
Are you in a position to move in (not in a chain and mortgage in place?) let them know, you will be a better option than someone offering a few grand more but that are a bit flakey deal wise or are stuck in a chain etc.

Finally, being friendly and instilling confidence in them that you are genuine will mean they are more likely to want to sell to you. An offer on the spot may by a bit awkward, see how it goes, but if the offer is made to the agent and you get a refusal, may be worth a call round again to see if the offer reached them.

My first house i paid £135k on a £140k house as I wanted it and went in at my max and got it.

My second place was £115k reduced to £105k and I got it for £90k which was a bargain lol!!

If you dont ask you dont get, that said, dont be gutted if the first offer really is turned down, just keep haggling.