Essex Police Force do not currently host any police auctions online. As soon as they join the majority of police forces in the UK and start using online auctions to sell their seized goods they will be added here.
In the meantime you can check out the auction house below which Essex Police have been known to use to auction items. Check with them directly to find out when their next police auction is.
Chapel & Chapel
499 London Road, Westcliff, Essex, SS0 9LG