«Для» или «за»? – This store is for the purchase of

Question

I was writing a paragraph, and a sentence within (and the previous sentence) is, in English:

(The first store sells mostly bulk produce.) The second store is (a) traditional (store), for the purchase of general household goods and foods.

to which I translated as,

Второй магазин традиционный (магазин), за покупкой общих домашних товаров и продуктов.

My tutor said it was better to say,

Второй магазин традиционный, там можно купить общие домашние товары и продукты.

or if I insisted on my English-sounding translation (which I don't),

Второй магазин традиционный, для покупки общих домашних товаров и продуктов. (of which after the nominalized verb I use plural genitive instead of accusative)

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I understand there are 'ways' people say things, so I accept the "There one can buy" impersonal construction, but my question is, "why для покупки instead of за покупкой?".

I myself have used these resources for for in English;

• https://www.alphadictionary.com/rusgrammar/for.html

• Difference between "за" (as in "за что-либо/кого-либо") and "для"

• "for the benefit of", на благо vs для?

but the problem is to translate the use of for even.... For example, the 2nd link's accepted answer would (to me) imply за, corroborated by point 3 in the first link.

However, point 2 of the first link validates my tutor's claim, as does the 2nd point in the accepted answer of the 2nd link.

Answer 1

“За покупкой” is a wrong choice to translate “for the purchase” in that sentence, “(store), for the purchase of general household goods and foods”.

“За покупкой” is “за” + Instrumental case, which is quite different from your link to Difference between "за" (as in "за что-либо/кого-либо") and "для" which deals with за + Accusative case.

“За покупкой” (“за” + Instrumental case) is about the aim, goal, usually used with verbs of motion (came to buy): “Он пришёл сюда за покупкой” – “He came here for a purchase / to buy something”. Here “за покупкой” is an adverbial modifier of purpose (Came here for what purpose? – To buy something).

In your sentence, “(store), “for the purchase of general household goods and foods”, “for the purchase of general household goods and foods” is an attribute (What kind of store? – A store for the purchase of general household goods and foods), so it cannot have за + Instr. after it; для + Genitive case (“for”) is used instead, as it was suggested to you: “магазин традиционный, для покупки общих домашних товаров”.

Other ways of translating that phrase, “(store), “for the purchase of general household goods and foods” include

• магазин, где продаются домашние товары (“store where household goods are sold”)

• магазин домашних товаров (“store of household goods”)