Sellers have until 7pm on Sunday night to enter gavelhouse.com's August online auction. A weanling colt by Tavistock, a share in Group One sire Shocking and a service to El Roca with proceeds donated to the Cancer Society of New Zealand are among the early highlights in the catalogue to be released on Monday night. Bidding on the auction will run from Monday 29 August to 7pm Thursday 1 September.