I would call the one on the left in the pic on your hand a Sedalia for sure. The one on the right is almost certianly a Nebo, and the one in the middle is tough to tell from the pic, but has a lot of Sedalia attributes. The one in the lower pic is also likely a Sedalia. Of the three, Agate Basins will be the finest in manufacture, followed by Sedalia and finally Nebo. Nebos tend to be more "spike-like" with narrower widths and thicker cross sections. Sedalias are normally slightly better made than Nebos, are often wider, and typically have a slightly mucronate tip. Agates are the finest made of the three. They will be covered in pressure flakes, be very lenticular in cross section, have a ground base, and be much thinner than the other two for a similar sized point.
Thanks for the pics!
Matt