Because it exists. And if you've got money, then you could buy it. I guess.
Spotted at the Wonder Festival figure expo in Chiba, Japan, by Kotaku Japan, this Bayonetta statue is priced at ¥46,000, which is about $588. Which is a lot of money.
While this is an unpainted prototype, the finished product will be painted. The figure maker is currently taking orders.
[ワンフェス2010夏] 大胆かつセクシー！ 『ベヨネッタ』フィギュア [Kotaku Japan]