I'm somewhat new to RGBs (2 years), but I have made two purchases so far from Ray Wu. One was a non-group buy purchase and the other was part of a Lone Star Holidays group buy. Both were good experiences for me--I got what I asked for, delivery was as promised, all my stuff worked, etc.... I am currently awaiting shipping of this year's new RGBs from HolidayCoro (my portion is held up by CG-1500 enclosures-arrrgh....). I am not familiar with the vendor you noted in your post, but I thought you might be interested in others' experiences.