Ask HN: Reseller agreements. What percentage does a reseller take?

If a internet SAAS company offers a service that charges a monthly subscription fee, and were to use the help of a reseller, what is the standard percentage that the reseller keeps? I've heard 30% as a general guideline, but was wondering if anyone else had any experience here or and tips. The monthly fees would start around 500 and go up to a few thousand.