I just bought a Soligor CD 70-222 macro lens-----in which the diaphragm does not work, otherwise the lens looks just like it came from the factory.
I paid twenty bucks for it, including postage so I am probably not going to give the seller a hard time, he sold it for soimeone else.
Who fixes such things; cost as long as it remains below 200 dollars is of small importance as I have always wanted this particular lens, and except for the obviously major problem it looks good.
Bobby