Huh, they don't even list their prices.
What web page developer would expect such a site to be helpful?
Well, Zhumell scopes are listed on Amazon. And they come up at Highpoint Scientific which is odd because you'd think they'd sell Apertura. Anyhow my 2c is Zhumell is associated with some other production line (GSO works for me).
In the cosmetics industry, on which I am now an expert (having read one book), you can develop a line for distribution, contact the American retailers, then go to China, get a contract, they start making the stuff....
...then they show off their fully functional factory to some other prospective distributor and engage separate contracts out of the same factory, often times undercutting their client #1. Client #1 may at this point be squeezed with price increase because the factory now has a relationship with Client #2. This often happens just before the shipment of a large order. That is, you, the U.S. retailer, put in a large order because you have had a hallelujah moment of success and gotten several contracts. The China manufacturer knows you will be dumped by these outlets if you don't deliver the large quantities of inventory you have promised. So this is when they squeeze, with a price hike, for example. If you don't want the inventory they can move it through someone else.
Under these conditions, you can see how someone like Zhumell might be doing OK one moment and then sinking the next. Whether Zhumell is coming back is hard to say. The China manufacturers don't want to bankrupt you but they are constantly pushing to see just how much you will cough up. And the China factory might be keeping Zhumell afloat just enough to pose a threat to other distributors.