買 is a Japanese kanji written with 12 strokes, listed here under the keyword “buy”. It is built from 罒 (net) and 貝 (shellfish). In Remembering the Kanji by James W. Heisig it is frame 894.
On KumiJi Glyph Explorer, open the parts search and type “net” + “shellfish”. 買 is among the results, together with every other character containing the same shapes.
Open 買 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.