Community Centre, Main Hall, Port Seton, East Lothian EH32 0BQ. Bring along your own 'junk' and sell it yourself. Tables on a first come first served basis. Entrance fee £2 for everyone. Refreshments will be available. Doors open from 6pm to 9pm. The venue has disabled access.
A list of rallies can be found at http://rsgb.org/main/news/
Remember to contact the organisers to check details if travelling far. I'm sorry but there was no phone number given.