While eyeballing Ebay I noted that the going rates seem to be:
X1900 GT - $175 to $200, substantially less than the egg
X1900 AIW - $225 or less, less than what they are on the egg
X1800 XT 256 - $225, or about what they are on the egg
X1800 XT 512 - $275 or more, or about what...