and pointing out every little thing you 'thought' needed doing to the agent did what exactly? The agent wont give a stuff and nor should they - its not big and certainly not even remotely clever and is as transparent as a window. In fact its laughable.
Insult property = low offer = insult the vendor = loose the purchase regardless of your eventual increase. Don't paly games- either buy it or don't. simple. Sure, make an 'offer' but lets say a place is on for 550k - anything less than £525,000 and you will likely be told to hop it.
OP congratulations on the purchase!
@ the post above, just read in the paper this morning that houses in our neck of the woods (Wimbledon) that were on the market for c£10m are selling for c£5m, people are making huge losses on their properties.