As someone pointed out earlier, Zap.com is a publicly traded company, with a 5.5m market cap. The odds of this being given away for anything less than 5.5m is about as close to 0% as you can get.
The real history is a lot more colorful than that. In the first dot-com boom, Zapata was a natural gas and fish meal company that tried to take over Excite (a major portal at that time) by rebranding itself with the name Zap.com [1].
They got widespread mockery and bad press coverage for that, and no longer use the domain.
