I'm with the rest, DON'T DO IT!!!
Unless you really need the money, or you are sure you never want to experience the most fun computer ever made, keep it in storage, or better yet get it out and experience what it is like again. Remember, there is a chance that some new hardware will eventually make it to market for the A1200 that will allow running AmigaOS4, and then you will be wishing you had your A1200 to try it out.
I have never sold an Amiga (yet), but may thin out my collection in the future. I would never sell all my Amigas and be without one. Since you are even asking this question, there must be some doubt in your mind, so I strongly suggest you wait, hold on to your Amiga and then if you get to the point where you are absolutely sure you don't want one anymore, then you can sell it. The price you get is not likely to change significantly so you won't lose money by waiting. In fact if a PPC accelerator that can run AmigaOS4 becomes available for the A1200 in the near future, the price will go up considerably.
