My milking equipment supplier told me he had some used detachers he would sell me for $700 each. I hadn't thought much about detachers and didn't ask a lot about them. Now I found Equipment Department has Boumatic Little Champs and Waikaitos for $200. Are these any good? What do you like, what should I look for in a good detacher, I milk 35 cows in an old stachion barn, thanks!