Green’s Dictionary of Slang

a street salesman, a ‘cheap jack’.

1851		Exeter & Plymouth Gaz. 1 Feb. 6/2: I shook with rage, discerning / Of basest tribes the hanseller.
1859		Hotten Dict. of Modern Sl. etc. 48: HANDSELLER, [...] a street or open air seller, a man who carries goods to his customers, instead of waiting for his customers to visit him.
1861		(con. 1840s–50s) H. Mayhew London Labour and London Poor I 354/1: The sellers of tins, who carry them under their arms, or in any way on a round, apart from the use of a vehicle, are known as hand-sellers.
1876		C. Hindley Life and Adventures of a Cheap Jack 10: Cheap-jacks, as they were then as now called by the people, although the term ‘han’-seller’ is mostly used by themselves.