No, no, no. ToysRUs made a perfectly logical decison that most any business would do and Google tanked them for it. ToysRUs wanted the url toys.com to direct to their site. They're all about toys and they simply bought a url that described their business and told the url where to take people. Google tanked them in the rankings because Toys.com came with link juice. Google assumed that Toys.com was doing this to manipulate the search engines but there is just, to my knowledge, ZERO evidence of this. This is another case of Google caring more about the possible spam threat than the actual rankings for searchers.
In theory, you could technically acquire a domain for $10,000 and be able to sell it for $100,000. You could also acquire a domain for $10 and be able to sell it for $100,000, $10,000… or $100, you get the picture. Because of this, it’s hard to recommend a perfect starting budget because your strategy, experience, and the pace at which you learn will hugely affect your buying and selling decisions.