W. Nee points out I think it was in Church and the Work that Junia was an Apostle and a highly respected one too. However, in Nee's day in his society, women had few rights like women had few rights in the first century, so obviously it would not be appropriate to have many women elders over many Biblical localities, until the time came in God's ordering. Priscilla may have been an Elder of her locality, if not, then an Apostle, "When Priscilla and Aquila heard him preaching boldly in the synagogue, they took him aside and explained the way of God more accurately" (Acts 18.26). This is very characteristic of an Apostle.
What we can say for certain is that Priscilla was an Elder of a meeting place: "The churches of Asia salute you. Aquila and Priscilla salute you much in the Lord, with the church that is in their house" (1 Cor. 16.19). But, upon closer examination we can also be sure Priscilla was an Elder of her church locality, because the first portion says, "the churches of Asia," in which Priscilla was an Elder of one of these churches in Asia. Hence, what follows is a most notable Elder, "Priscilla salutes you" and she had helped Apollos showing she had authority and was a gift for the Church in the Work. Formerly she could have been a "helper" (Rom. 16.3), but then becomes an Elder of a locality, and perhaps one day she became an Apostle for a region of churches.
It would not even be feasible to have a lot of women Apostles either. But now that day has come, for the past century women can vote now, even be CEO's of corporations and presidents of countries.
We must reasonably conclude then that women can be elders also, not just apostles; after all, if women can be apostles, then surely they can be elders too, for the highest worker in the church is the Apostle (like Junia) who was directly commissioned by God to appoint Elders of a locality.