I live in Edenbridge which neighbours both Sevenoaks and Oxted so not as expensive as those too yet being in the middle i have a choice on what junction for the m25 i can take depending on what way round/Traffic etc
Junction 6 and 5 are just ten mins away which is good for south london etc
We also have TWO train Stations in the town, one of which has an express to London Bridge

http://www.edenbridgetown.com/

Regards
Ian