Mecum runs on a "volume" model. Several days their sales went past 8PM in the evening. Not many bidders there. They do little vetting of entries. Their primary interest is making sure no number jobs come through. They do have ex-policemen examining. I have helped them in the past with certain units.
Auctions are funny. They sold an estate on Wednesday morning. it was no-reserve. I told people that they will be cheap. They were. I wound up with the C-Touring Rapide. It was semi-matching numbers. I knew three of the previous owners. A few days later an extremely tatty one with need for total refurbishment sold more than 2X. The C Shadow that sold for 130K+ BP was very nice. It was owned by Dan Gurney the famous race car driver. He rode it to and from the sows that he won. On later C's in the states, I have found that people will often take off the knurled knobs and put on tommy bars. They think they're cooler. Hi number C Shadows are always suspect.