Interesting thought, however we are already heavily inundated with domains daily in high priced that have to be sorted, 95% don't make it and are never seen by the public. Adding a $10k+ forum would more than likely get hit harder with requests and only 0.02% submitted might make it.
For now I feel that whether a domain is $1k or $100k, it fits fine in high priced. We may re-evaluate this in a few more months after we've had more time to review the quality of names submitted.
Eric Lyon