I've been thinking about getting a full bottle of By Kilian Pure Oud for a while now. Not really keen on shelling out $400, though. So I saw there was an "Oud Harmony" sampler for much less, and I was able to get four scents, each 7.5 ml: Pure Oud, Musk Oud,Incense Oud, and Rose Oud. These should all last me a while.
Of the four, I only really like Pure and Rose. If I finish this bit, I may get a refill of one or both.