Such determinations cannot possibly be made in any sort of subjective way, because every tyer has their own opinion on what is important in hackle. With some, it is the number of hackles that will wrap tiny tiny flies. With others, it is the color of the hackles. What I will not do is try to gauge these hackles based on number of flies tied per patch. That's an interesting number, but not one that I care much about.
Value is something that needs to be determined by each buyer.
What I will talk about is the quality of the hackles. The way they tie. I will discuss the range of sizes found on necks and saddles. I will talk about how the hackles behave when palmer wrapped, parachute wrapped, and wrapped in a traditional 'Catskill' fashion. I will talk about the colors, the barb density, the 'sweet spot,' and all the other attributes that fly tyer's will consider when choosing hackle.