Rashi #1: Because it consisted of two stories, a ground floor and an attic (or two rooms, one within the other). ¹

Rashi #2: Because only couples were buried there. ²

Ramban #1: That was the name of the cave. ³

Ramban #2 (citing a Midrash): Because Hashem 'folded Adam's height' (who was 100 Amos tall) before burying him there.

Seforno and Rashbam: The entire area (valley) was called 'Machpelah;' as a later Pasuk states, "ha?Sadeh asher ba?Machpelah" (23:17). ⁴

Gur Aryeh: Based on the dimensions of the cave itself, it was determined that it would be suitable for four couples to be buried there.

Ramban #1: Because he considered it a gift for which he was willing to pay - in full.

Ramban #2: It is a manner of speech to say ?Yiten? [even] for a sale.

Seforno and Rosh: ?Ve'yiten Li? means "Give me permission to make it a burial site." He did not have in mind to receive it as a gift.

Targum Yonasan: ?T?nu li? means (not ?Give me?, but) ?Sell me?

Or ha'Chayim: Avraham was wise to use an expression of a gift, in case Efron would contest the sale in the future, claiming that he did not know its value, especially according to the Zohar, that the cave was always dark and he never saw it inside.

He was willing to pay an exorbitant price because that is what Efron asked for. ¹

Oznayim la'Torah: Avraham specified three reasons as to why Efron should agree to the sale: (a) He only asked for the cave and not for the field ¹ in which it was situated; (b) He pointed out that the cave was at the edge of the field - so that firstly, the sale would in no way interfere with the owner's usage of the field and secondly, it was far away from the town and the residents would therefore not be disturbed by the smell ² and (c) He would confine its usage to a burial-site, and not encroach upon their (current) rights to the land.

Ohr ha'Chayim: Avraham asked only to buy the cave. "La'Achuzas Kaver" teaches that he will bury also others there; Efron cannot protest that he sold a lone gravesite, and does not permit others, lest traffic increase through his field.

Malbim: Even though people do not sell their inheritances to strangers, this does not apply to a small corner "bi'Ketzei Sadeihu." Even though it is la'Achuzas Kaver, since it is a gift, Efron can rule that this does not violate the custom (refer to 23:8:1.1:3*).

Ha'amek Davar: Since he was selling it as a grave-site, the neighbors would not be able to protest ? seeing as a grave-site obtains rights to a bigger path to it than a lone grave does.

Riva: When he ran to the herd [to get bulls for his guests], a bull fled to there, and he saw that Adam and Chavah were buried there (Midrash ¹ ).

Gur Aryeh #1 (to 23:2): Refer to 23:2:2.3:1. Chevron, city of giants, was meant for giants of the spirit. The name Kiryas Arba shows its connection to the upper worlds.

Maharal #1 (Chidushei Agados Vol. 2, p. 53, to Sotah 13a): This location was appropriate for the foundations of the world, namely the three Avos, as well as Adam, the father of all of mankind. A place (Makom) is defined as an area of four by four, ¹ and as such, four couples are buried there.

Gur Aryeh #2 (to 47:29): According to the Midrash, the dead will be revived from within the Me'arah.

Maharal #2 (Chidushei Agados Vol. 3, p. 84, to Bava Basra 58a): Just as the cave was doubled, each of the forefathers had a dual aspect - both his own achievements, as well as being the cause for the achievements of his descendants.