truthsayer,
ralph blum's "serenity runes", while not the entire 24 or 25 symbols of the rune alphabet, is SUPPOSED to be only five runes--you didn't get cheated! based on the concept therein (the "serenity prayer"), i don't believe it is intended to be percieved as an incomplete set of runes. the original retail price was a bit much, wasn't it?
for others not familliar with this set: each ametrine stone has a rune symbol carved on it, representing a particular word in the serenity prayer ("God", "acceptance", "courage", "serenity" and "wisdom"). it includes a pouch, a laminated card of the prayer, and a small, hardback book. i especially liked the book.
this is very much a "gift set" type of product; i found it to be a great way to introduce certain friends to the general idea of healing/divinatory things. for example, i gifted this set to one of my co-workers, who was then inspired to investigate other forms of divination, and now thoroughly enjoys the i-ching.
i can understand how a serious student of runes would find this set to be incomplete. most individuals that i gifted this to (four or five--that clearance deal you referred to!) have moved on to "whole" sets of runes; a couple of them (like my i-ching friend) just found that runes aren't the right cup of tea--but the cool thing is, they have each found something else!