I sent them a message a few days ago and got this:
Hello, thank you for contacting us.
Travel Bass is still in the development stage, the case is still in the design stage, for this the price is not completely defined yet, but it will be around $4000/4500.
Travel Bass official website will be online soon for all details and information about selling prices and distribution channel.
Thanks again for your interest and stay tuned to the Travel Bass facebook page for all updates and all latest news.
Travel Bass Team