Q:

What are the pros and cons of the Sony α230 DSLR? 

I am wondering if I should buy a Sony α230 DSLR.  My price range is $500.  Does this camera have a removable lens, or a fixed one? 
What are pros and cons of this camera model? 

A:

Not that is anything wrong with the A230, all recent DSLRs are good and feature interchangeable lenses. 
Only the A230 is discontinued.  Sony's new sensors give much better image quality in low-light and they do have several models within your price range: Sony A290 goes for under $400.  They also have the A390 which costs more but with a smaller viewfinder and live-view instead, the rest is the same so the cheaper model leaves you more money for lenses, which is more important. 
There may be other brands too but not many models under $500.  Since Sony makes sensors for almost everyone except Canon, expect image quality to be similar among cameras of the same generation.  The biggest different is which lenses you can attach and that Sony cameras have built-in stabilization (like Pentax and Olympus) which gives you that feature for free without paying more money for stabilized lenses.