I needed to order a couple, I tried the address below and got an unknown address error. I tried through ebay and they are blocking email addresses. After some hassle I was able to contact him directly. His new email address is:
linearmotionbearings2008@aliyun.com
I saved $60.00 on my order of RM1605 800mm and 1200mm,(no machined ends) ball screws over his price on eBay.