How much did a tyrannosaurus rex weigh?

Archaeopteryx probably weighed between 200-600 grams, based on the sources below. This is about the size of a magpie.

Sources:

Yalden DW (1984) What size was Archaeopteryx? Zool J Linn Soc 82:177-188

Wellnhofer P (1992) A new specimen of Archaeopteryx from the Solnhofen limestone. Nat Hist Mus Los Angeles County Sci Ser 34:3-24