Even though I'm a hobbyist, I would still rather pay a little more and get something half decent that will last. I'm generally not a fan of Chinese products unless they are made by a reputable company (I'd have no problems buying a Fluke meter for example even though it's made in China).
I am very wary of stuff on ebay, especially when they can't even get their English right. Using your Wellon product as an example, straight away it's over $30 more expensive than a reputable brand named product. In terms of build quality, the Batronix is a nice solid aluminium construction which I much prefer over the crappy plastic ones. I can almost bet (without having seen inside either) that the build quality and attention to detail is far greater in the Batronix products as well. It uses nice solid USB Type B connectors which I much prefer over mini connectors.
There is also no need for an external power supply on the BX32P for any of the supported devices, where as with the Wellon product, some require external power (probably from an equally crappy Chinese power adapter).
Maybe if the Wellon VP-290 was AUD$70 or something, OK, maybe it would be worth a look at. But as it stands, it seems over-priced for what it is.