Webster's Revised Unabridged Dictionary · 1913

Dicker

Dicker , noun

[Also daker, dakir; akin to Icelandic dekr, Danish deger, German decher; all prob. from Late Latin dacra, dacrum, the number ten, akin to Latin decuria a division consisting of ten, from decem ten. See Ten.]

1.
The number or quantity of ten, particularly ten hides or skins; a dakir; as, a dicker of gloves. [Obsolete]
A dicker of cowhides. — Heywood
2.
A chaffering, barter, or exchange, of small wares; as, to make a dicker. [United States]
For peddling dicker, not for honest sales. — Whittier

Dicker , verb, intransitive and transitive

To negotiate a dicker; to barter. [United States]
Ready to dicker. and to swap. — Cooper