Based on good auction photos, the authenticity can often be judged already; especially Solitaire models are well checkable due to detail-rich finishing. In specialist trade and in boutiques, list-price binding generally applies; a sale below it can lead to delisting of the dealer by Montblanc. With a friendly enquiry, discounts of 5 to 10 percent are quite possible, in rare exceptional cases also more. Anyone who does not know their way around should preferably buy in specialist trade, since there advice and authenticity guarantee are ensured.