Matthew Poole and continuators on Genesis 23:16

16 And Abraham hearkned unto Ephron, and Abraham weighed to Ephron the silver which he had named, in the audience of the sons of Heth, four hundred shekels of silver, currant money with the merchant ▪

For in those times silver was paid by weight, Gen. 43. 21. Ier. 32. 10.

(i. e.) Right for quality as well as weight, in the judgment of Merchants, whose frequent dealing in it makes them more able to judge of it.