went to my walking foot repair man today to pick up my machine. Almost top shelf was a vintage very large Durkopp Adler cylinder arm. He said it was a very good machine and had a huge bobbin. It had a crack around the upper right top half circling nearly around the whole thing. I climbed up to push on it and it was stiff and didn't move or wobble. I asked him what happened and he said it fell. He would give it to me for $500. I told him my boyfriend has 40 years experience welding {that's his profession}, and could repair it and he said the mechanisms work perfect and it should be fine. It looks like it has been painted but not sure. I am unable to really see the total damage and need to take it off the shelf to inspect further. What do you think. Is it possible it could work and fall from my guess around 15 feet. Should I consider buying it and what should I look for. I'm new to this repair man and haven't built trust or a relationship with him yet. The crack is not the cylinder arm it is on the top next to the stem, if that helps.