replying to cynthiamyra, Iggy wrote: That's how I started becoming a do-it-yourselfer. I bought an 80-year old place as my first home and had leaks under every sink. I went to Rickel or Channel (I don't remember which was earlier, but it was the leading home improvement store at the time), since there were no local Mom and Pop hardware store.
I simply asked if there were replacements for sink drains for inside the cabinet. They said yes, gave me one and simply explained that I unscrew what's there and put this in and that I may have to cut the straight pipes to size with a hacksaw. It worked like a charm at all three sinks.
I had watched This Old House frequently, but then I became a devotee and took on more and more repair and renovation projects. Quite soon I found there really isn't much to repairs and that just doing them with fairly minor research or mimicking was all that's needed.