Snagged: Low level minhag? Watching what people buy this time of year shows that it is a vibrant minhag.
http://www.hebrewbooks.org/pdfpager.aspx?req=14166&st=&pgnum=111
http://www.hebrewbooks.org/pdfpager.aspx?req=14166&st=&pgnum=112
yid18: Heard from various sources in Baltimore – lettuce, half a raisin, and celery for “let us have a raise in salary”.