In uk.d-i-y, Foreign Student wrote:
...about buying in auctions:
1. Is it worth getting a surveyor to look at the property?
2. Generally, will the guide price be close to the sale price?
3. If planning permission to convert the garage into a dwelling could
be secured, how much will it raise the subsequent auction price by?

Go to another auction the day/week/month before, just to observe.

--
Mike Barnes