Blade servers basically reduce the hardware footprint and simplify cabling; thus, making it a very good complement to a virtual infrastructure. Each blade is a server so you save space and reduce power consumption.
Very general pricing for blade servers are as follows:
A blade enclosure can cost around 7 – 10 thousand dollars.
Depending on the blade server build, you can get them at around 3 – 5 thousand dollars.
The network switching options can cost you around 3 – 5 thousand dollars as well.