It's a good beginner bike I think. I remember when I first started trials ages ago, I had a Shogun Gimp, Edd had a Onza T Bird and Danny had one of those It says it's in excellent condition. If I was you I'd get it!
Learning to back hop and balancing on the back wheel may help too. When I begin sidehops I find that balancing really helps before kick hopping into it.
I was wanting a viz hub a few weeks back and my friend suggested I should get one because they were good. Not sure on the rim as I've not used or heard about it.