I think judging by the sounds of the demand, that a limit of 1 rake per customer would suffice and most likely still see the dickies sell out and if they don't sell out now at that limit they will sell out during future flash sales. Can Shopify maybe generate single use discount codes, specific to the dickies that could be emailed to existing customers in advance of Black Friday? There will be a lot of unhappy campers if 10 people buy all the rakes up in the first 60 seconds. I've already promised my son a few. I hope that wasn't too hasty!