Key facts: Under 20 Pa. C.S. § 3102, siblings inherit equal undivided interests in intestate estates without surviving spouses or descendants; co-tenants may negotiate voluntary buyouts or petition for court-ordered partition; Pennsylvania imposes 12% inheritance tax on property passing to siblings; partition by physical division is rarely ordered for residential properties; written buyout agreements must be properly executed and recorded; the $50,000 threshold affects small estate procedures but not buyout mechanics directly.