So... I decided to pass. I don't need -or even particularly want- another pair of shoes. I already have 3 that I really like.
I told him to sell 'em on ebay where they will certainly fetch at least double what he was offering to me. FWIW, they are 1 year-old Rapha GT shoes in black that he wore maybe 25-30 times. He wanted only $50 for 'em.... Size 46.5.
Exactly like these (but with a bit more patina

)