"It's just a rare opportunity for people to have a look at them and if they're serious motorbike collectors and they've dreamed about owning one of those motorbikes, it's probably their one and only chance to buy one.
"If they don't sell in this auction - at least 20 of them - they're going to get packed up into a container and sent off to either the US or Europe and get auctioned over there."
The collection includes six racing motorcycles owned by former Grand Prix racer Ginger Molloy.