[Wannabe]

Yes, the "Kangzhu" is sold on eBay without that name by many sellers. I would suggest doing a search of something like "breast suction" and sort by lowest price first. I would not buy from the seller in the above link, though. They have a feedback of 95%, which is actually very bad. I've been an eBay seller for many years and it's very easy for a decent seller to maintain a rating of 99%-100%. I'm still at 100% after 10 years and thousands of sales. Also, since I'm in the USA, I tend to filter out the Chinese sellers, such as this one, simply because most orders I've had from China have taken nearly 2 months to receive (I think they wait until they fill a shipping container to ship). There are a number of sellers who sell this and ship from the US.

As for pumps being safe, I consider it the safest NBE method. I'm very squeamish about taking any sort of supplements that might alter my hormone levels, but I have no problem with pumping. When you first start, just use one cup for awhile until you get used to using it. One thing I don't like about these cheaper systems, though, is that the pumps have no release valve. If you over suction the only way to relieve the pressure is to work your finger under the outer edge of the cup a bit. Other than that they seem to work well enough for me, though I've read stories of valves breaking after a week or two. You have to be careful with these gadgets.