Timeline for Any item offered for purchase: is it a 'sales item' or 'sale item'?

Current License: CC BY-SA 4.0

14 events

when toggle format	what		by	license	comment
S Dec 15 at 0:19	history	suggested	user623943	CC BY-SA 4.0	EditQuestion
Dec 14 at 18:49	review	Suggested edits
S Dec 15 at 0:19
Dec 14 at 18:45	history	edited	Peterש	CC BY-SA 4.0	deleted 12 characters in body
Dec 14 at 18:39	history	edited	Peterש	CC BY-SA 4.0	added 382 characters in body
Dec 14 at 18:34	history	edited	Peterש	CC BY-SA 4.0	added 382 characters in body
Dec 13 at 16:56	answer	added	Yorik		timeline score: 0
Dec 12 at 20:32	comment	added	Peterש		But why is that? I surmise it's because 'sale' has that ambiguity (see my comment below) of meaning both 'an act/ process of selling sth.' and 'an occasion when a shop or business sells its products at a lower price than usual'.
Dec 12 at 20:20	comment	added	Barmar		"sale item" sounds to me like an item that's on sale, which means it's being sold at a discounted price, not an item being sold.
Dec 12 at 19:28	answer	added	Lambie		timeline score: 0
Dec 12 at 19:25	history	edited	Peterש	CC BY-SA 4.0	added 268 characters in body
Dec 12 at 19:19	history	edited	Peterש	CC BY-SA 4.0	added 268 characters in body
Dec 12 at 19:18	comment	added	Edwin Ashworth		Google 2-grams indicate strongly that while 'sales item' and 'sale item' are both widely used, the variant with the singular-form attributive noun is far more idiomatic. This is doubtless partly for the reason you mention, but also because the singular-form attributive is the default. See Cerberus's answer at When are attributive nouns plural?
S Dec 12 at 19:05	review	First questions
Dec 12 at 19:25
S Dec 12 at 19:05	history	asked	Peterש	CC BY-SA 4.0