* A work of art that's appraised at $10,000, for example, but that's priced for sale at $5000, is not necessarily a bargain. As stated above, a retail or insurance appraisal can be many times the fair market value of a work of art. Always determine fair market value first, no matter how big a bargain the seller makes you think you're getting.
In general the aircraft must be at least 500 feet away from any person, vessel, vehicle, or structure. In congested areas the aircraft must stay 1000 feet above the highest obstacle within a 2000 foot radius of the aircraft. There are special rules for helicopters that allow them to fly closer than these general limits.
Although there is not a specific speed limit for commercial planes above 10,000 feet, pilots have to abide by the aircraft manufacturer's maximum safe speed for the aircraft to fly.he maximum speed of a plane is completely dependent on the aircraft type. Captain Al Bridger confirmed that a Boeing 747 (Jumbo Jet) has a cruising speed of 575 mph (Mach 0.85) at 35,000ft.