That is not entirely true... You can get a pretty decent, not 100% in shape antique sword for from 500 bucks.
For $500 you get a Gunto, a WW2 officer sword. They are often factory made, some are however handforged with a good hamon. The fittings are often kind of rough, since it was actually used in the field. Some are even in stainless steel, but I wouldn't recommend buying one in stainless (if you want a REAL sword).
For $1000 up to $2000 you can get a actual real sword. That can be in excellent condition, depending on the age of the piece itself.
What one should be aware of is the actual work it is to have own a sword. You must think of the humidity of the surrounding of the sword, also to take proper care of it. It is NOT just something you buy and put on the shelf, it will RUST. And there will be damages that can't be repaired. A sword is not a toy, it is great responsibility. I feel sick every time I see or hear about people who abuse their antiquities.
Also, it is an art itself to evaluate a sword. To see what is and what is not a fatal wound to the sword. And also how to value a sword. Buy a book or two before buying a sword, even if you are thinking about buying a newly made factory made or whatever.
I can recommend these links;
http://www.japanesesword.com/ http://japanesesword.homestead.com/files/nihonto.htm
It will get you started, I recomend buying a book first. And think over it at first...