Whilst you can pick up a Model B Raspberry Pi for just $35 there are some hidden costs to that.
Here is a check-list of everything you need to make use of your Pi:
There are optional cables such as a 3.5mm lead for any of your audio output equipment or an RCA out though I won't be mentioning this in the guide from now on as HDMI is pretty much standard nowadays.
Whilst choosing many of these things on the list are easy a tricky one is the SD Card and it is very important you choose a good quality one to get the best speeds from your Pi.
On the next page I will explain what makes a good SD Card.