Much around BMX frame

I was walking the dog a few hours ago when I saw a friend doing tricks on his BMX and I thought to myself, "wouldn't it be great fun to build a BMX in my spare time!". There are 2 problems with this idea.

1)I'm low on money and could probs afford a frame up to $100

2) I have no idea about BMX at all. (since I ride road.)

It would be great if you guys could give me a few ideas on which frames would be suitable.
I want to be able to learn tricks on this beast and I also have a little background in freeriding/MTB.

Thanks,

Sam
 

Frayed

Likes Bikes
Frame and cranks

Hi, I have a Stolen Heist frame, Stolen Forks and 3 piece cranks you can have for $90 plus postage if that helps at all.
 
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