That very point also struck me; now, granted, I have no issue with paying impoverished farmers who produce a high quality product (ecologically, organically etc) not only a fair price, but a high price. (Some of Intelligentsia's recent offerings clocked in at over $35 per quarter kilo).
On this occasion, not only is the coffee priced agreeably (although that is not my quibble) but the transport is commendably reasonable (okay, the question of distance is negligible in tis instance).
However, the upshot of it all is that it seems that I have paid a lot less for these four coffees than I have paid for what seem to be a similar quality product from the US.
Anyway, the true test is that of taste: I will let you know what my thoughts and findings are when the coffee puts in a welcome appearance.
Re choosing, I read the accompanying piece to each of the coffee beans on offer and decided to stick with coffee that I know I will most likely love - i.e. the stuff from the tried and trusted regions that I know produce wonderful coffee, - such as - Sidamo and Yirgacheffe, rather than trying to sample something too radically new.