I bought one for a 2nd calf for a dairy cow we have to raise. Heifer, all black but dairy cross. A week or so old. Guarantied to not be a free martin and she didn't look like one. She was $250 or 275.
Back in January, I bought 2 cross heifers for my jersey to raise (she lost her own calf). The guy said they weren't twins (different mothers) or free martins, but they sure look like free martins to me on a external exam. They were $250 each and I was glad to pay it. Finding calves that were within a reasonable drive on the day I had available to go get them was like finding hens teeth. And I was tired of hand milking her even though she was easy and enjoyable to milk. Those two little heifers and the best looking fat little calves I have ever seen on a nurse cow. She took right to them even though this is her first freshining.
I enjoy seeing one cow raising two calves, even if I need to find a second one to put on her.