Was Mary the Copt a virgin or a non-virgin before the Prophet, peace and blessings be upon him, and did anyone take her as a concubine before him?

There is no explicit evidence that the Prophet, peace and blessings be upon him, did not marry any virgin other than Aisha. This aligns with Aisha's narration in Sahih Al-Bukhari. As for Maria al-Qibtiyya, she was not a wife but a concubine, and therefore Aisha's statement does not pertain to her. Researching this matter is not considered to be of great benefit.