[EllaC]

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.

Wannabe, thank you for such a good info! I do not buy often on Ebay so I don't know how it works.

And yes, it's the safest method maybe but the toughest one too!

Is there any difference between Noogleberry and Kangzhu ? Of course it would be great to pay less money for the same results. I think that maybe L cups will be so big for me but also I think that as I want upper fullness as well, It might be suitable. Any suggestions?

Kangzhu have their own little built in seal around the edges from pictures and a friend who used it. She really liked it fyi.
Noogle has the airlock = brilliant plus big squishy comfy foam rings = brilliant plus you can email Lucy from Nooglebery and shes geniunely willing to help and you get a very prompt reply. 
Not convinced you'd get the same from Kangzhu... but if someone can testify otherwise il take it back.