I would actually prefer a mantis that is smaller than a peacock. I had a G. ternatensis that I absolutely loved, but I lost him a year or so ago. I've been looking for another since.
As far as what I'd be willing to pay...it would depend on the species. I'm patient enoughto wait for one that is a good match for me. I'll check out the distributor you mentioned and see what he has available. Thanks.