Here's my squat rack.
A bunk bed frame and a trampoline frame, picked up from the side of the road, held together by scaffolding clips, bought from a bloke who collects rubbish and sells it. The pavers it's standing on were also from the side of the road.
The bar is from a pawn shop; most of the weights are from Gumtree.
The largest plates are 20kg, $39 each from Kmart.
Weight on the bar in this picture is 99kg - I managed to do 5 x 5 with this this morning.
[Why can't I paste the picture directly into this post? When I try, it comes out as text (& exceeds the limit).]