Conventions to sell 별, 스타 trek collectables uk 2016

Hi I have been keeping lots of collectables from 별, 스타 trek most boxed excellent condition comincs 책 games figures ships uniforms phasers rank insignia rare pc games board games enterprise dedication plaque from tv show
i was hoping to sell at a conversation in uk this 년 for 50th anniversary but can not find anywere please help
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