販 is a Japanese kanji written with 11 strokes, listed here under the keyword “marketing”. It is built from 貝 (shellfish) and 反 (anti-). In Remembering the Kanji by James W. Heisig it is frame 783.
On KumiJi Glyph Explorer, open the parts search and type “shellfish” + “anti-”. 販 is among the results, together with every other character containing the same shapes.
Open 販 in the interactive kanji search
to expand every part down to its smallest pieces, add your own names and mnemonic stories,
or search for other characters by their parts.