When buying full hackles and not hackle packs, the best rule of thumb is to buy the best hackle that you can afford. Because a neck will last you quite some time and is an investment in materials.
That being said, those hackles are fine to learn on and fish with. When beginning to tie I began with indian necks. While they are said to be nearly unusable these days in comparison to genetic hackle......I do remember quite a few fish that ate them when they were all that was in my flybox:^)