A 19th century British colonial stamp – last owned by a crazed millionaire killer – went for a record $9.48 million at auction Tuesday night in New York. The 1856 British Guiana One-Cen… ...

Doomscrolling is out. Stamp collecting is in, and these are the most valuable stamps that collectors keep showing up for.

A stamp called British Guiana 1c magenta is expected to fetch around $15 million. The so-called Mona Lisa of the stamp world will be auctioned at Sotheby's on Tuesday.