After I made the Puma trainer post, I actually purchased the trainer from kitbag.co.uk, but the next day they emailed me saying:

With regard to your order placed at Kitbag we are very sorry to inform you that one or more of the products you have requested is not available. This is due to an error when we attempted to assign stock to your order. Please accept our sincere apologies for any inconvenience or disappointment this may cause. We would be delighted to help you find an alternative

Soon as I checked the email (2 days later), I went on the kigbag site and the item was still up for sale… really annoyed, stupid timewasters.