Greengrass

I’ve recently inherited a beautiful 3.2 1990 Sovereign that has been dry-stored for the past 22 years. It’s done approximately 25k miles, is completely original and in extremely good condition (almost immaculate) with a full Jaguar service history. Red exterior and cream/magnolia (?) leather interior. It’s in the garage being checked over and MOTd, but running immediately. However, I’ve no idea what it’s worth and so hoping you experts might be able to help me?