Unless I'm using the wrong search terms it seems like there's an awful lot of rusty old gouges listed for top dollar, and joinery shops offcuts cut into inch thick bowl blanks. My personal favourite today was this cherry tree which appears to have been stabilised with unicorn's tears. The trunk sections are splitting already.
https://www.ebay.co.uk/itm/353867991922?hash=item52642d0b72:g:ScQAAOSwpY5hu81l