I would like to thank everyone that has responded to my posting, you all have been very informative and I learnt so much from just these few response.

I now know what the differences are in the several frames, that a 28ga. is probably way out of my price range at least in the near future, that lengthen a chamber doesn't only devalues a collector but could end up damaging a gun not design to handle the larger loads and with a little patience I can find the prefect gun at a equally prefect price.

I know this is just the beginning of my education concerning Parkers, but the most important thing that I learned is that there is a great support system on this forum with extensive knowledge where all you have to do is ask and its member stumble over one another to try and help. Thank you!