Here's some bumblebee males from Bailey & Bailey Reptiles, Tim Bailey is an awesome guy. He's the only one I'll go to now. Also, his prices are decent.

http://www.baileyreptiles.com/10bumblebeeav.html

As for things to look for in a bumblebee, they are all beautiful. There's no way you can go wrong. Just buy one that you like, that's all it boils down to.

All spiders, and anything that carries the gene will wobble. Some more than others, but it does NOT affect their eating, pooping, or life span.