They are the base Sabia V6 Experimentals with no modifications, so they are not technically the Vunbuds. But they are still great. And they only cost $18 US total (after shipping), so a pretty good price.
They are great. My buddy got them for me, and I bought a backup pair (you can get them off of ebay
here).
The Sabia V6's sound very similar to the RY4S UE, but they have stronger bass and slightly more elevated highs. So if you'd like a slightly more V-shaped RY4S, these are the ones. The bass can really get thumping when called for, but without sounding like a muddy/boomy mess, so they are pretty amazing in that regard. Bassheads rejoice!
My buddy also introduced me to the Kube a while ago, and just recently the Kube2. Both are really different and cool beasts. They both have a fair amount of bass and nice mids (they excel in Chinmie's "Let Down" test lol). The Kube's highs are a bit more elevated than the Kube2's, but neither are too elevated, are both detailed, and are both non-fatiguing. The Kube2's seem overall warmer and are even more non-fatiguing, so they are great for long term sessions. What's also cool about them is that they both have big soundstages, with the Kube's soundstage being somewhat surreal.
Anyway, here they all are along with the RY4S UE:
What are you not liking about the Vunbud?