Green’s Dictionary of Slang

stuffer n.1

1. (UK Und.) one who passes off inferior goods, claiming them to be of higher value.

[US]Whip & Satirist of NY & Brooklyn (NY) 5 Mar. n.p.: Gay dresses, given them by a couple of watch-stuffers.
[US]Nat. Police Gaz. (NY) 13 Dec. 133/3: On going down Broadway [...] he was accosted by a watch stuffer who, with the assistance of his pal or capper, endevoured to stuff him with a mock watch.
[US]Ladies’ Repository (N.Y.) Oct. VIII:37 317/1: stuffer, One who passes off inferior goods as being of higher worth.
[US]N.E. Police Gaz. (Boston, MA) 18 Aug. 5/1: Old St—e, the sucker, the watch-stuffer, and loafer.

2. see stuff v.2