The site was redirecting to maine4marriage.com previously, and I had a free appraisal done which ranked it #2 on a google search ranking. However no traffic or revenue to report as had not been directly tracked.
On the day of the royal wedding, you get a 50% increase in appraisal!!! I would say the domain as-is at the moment could go for $20-30 (on any other day), due to lack of specific knowledge.