Re: I wanna start.... but where at? *PICS*
The base looks like it's in great shape. I'd just take a little CLR to the down stem and ports. Clean the hell out of it, pick up a cheap bowl and a grommet set at a local shop and give it a shot to see how it works. Then if you decide to get a new pipe and such, check out the vendor I mentioned above and/or any other vendor for good deals.