Newbie Wanting His First DSLR Camera and Lens

[Bourbon]

Hello All,

As the title says I would like to purchase my first DSLR camera and lens. I own a Minolta Maxxum 7xi SLR with two lens which I no longer use.

What I want a DSLR for is to take HQ photos of my reef tank, primarily. And also just for everyday life.

So for the reef tank I'll probably need a macro lens, to quickly snap pics of fish and swift moving coral. For everyday life I will just need a _______ lens (help me out here).

I want to be able to take pictures like this:

And In total I would like to buy a camera body and lens (x1/x2) all together for $500 or less. So I will be buying off ebay. I would like a wider selection then besides Nikon and Canon, because I would never find a Canon w/ lens for less than $800 even on ebay (unless its broken).

Please help me out

Thanks