Well, if you like and it fits you, then buy it. But $125 is quite a bit for that. I have nearly the same bike that I built for $30. I bought the bike (a Schwinn World) at a yard sale for $10. Then removed all the extra stuff, bought a BMX freewheel for $10, and was onthe road. $10 for some new cables.
Here is a pic
http://img221.imageshack.us/my.php?image=worldmb3.jpg