Poorman and Dima- I emailed sandro to enquire about MTO shoes and on the off chance that they had some subs in stock in my size to get an idea of their fit, as this would be the cheapest way of gauging comfort, quality, sizing etc. She said she would ask the factory whether they were able to sell the seconds, so I can't imagine they get many requests for this and I think they don't really know how to price them. Firstly they emailed me photos of 5 shoes in a UK8 saying there would be a 25% discount and noted the defects, they were all minor, like dark patches of leather or slightly scuffed suede.
I replied saying I was expecting a slightly larger discount, in line with when I've visited the Northampton factory stores, she then replied with that pair of double monks at 30% discount, and they had a dark patch very close to the sole, it was very small and would become unnoticeable after a few polishes.
Overall I was very happy with their customer service, always responded very promptly and helpful. On the pricing, I think I could push for a slightly better discount for them, but I've got to weigh up whether I need another pair of double monks even at that price!