building a trailer question

i figured it wouldnt be too much to build one.. seen axles on ebay new for about 150-200 a piece.. and the rest would just be metal. already got the welder/tools, just looking for ideas.

the average price of steel is going up and fast it will probably be cheaper on you to buy a built one rather than you building your own the only way at the moment to get steel cheap is in bulk...