Sure the perfect buyer should find out about the wobble in spiders before buying and ask about the spider they are considering buying and wobbling. But I'd still consider any seller who doesn't disclose wobbling to be less than ideal also.

Selectively breeding for non spinning spiders assumes that the difference between spiders that spin and those that don't (ever, yet, or much depending on who you talk to) is genetic. Most things are genetic so it's certainly worth a try. But given the reports of spinning skipping generations and that it hasn’t been breed out yet this far into the cb spider production I'm worried that it might be part of the mutation its self and not be possible to breed out.

Sounds like you just got this spider. How old/big is it? If you do keep it, let us know how it does a few months down the road. If the difference between spinning and non spinning spiders turns out to be environmental then the change of environment to your rack might make the spinning stop.