Echoing what others have said: Jess advertises them honestly (if she knows about it, she will tell you) and has fantastic connections. The main thing to remember is that it is a business of selling off track thoroughbreds; they have different training, soundness expectations, and career limitations than what a sport horse barn might. What a race horse flipper says is sound will be different than what a sport horse person will. Some of it is residual soreness from the track. Some of it will be something more. It’s always a good idea to do a PPE and have multiple eyes looking at the horse.
It’s a risk buying a horse off the track. Go in with that in mind; no one has a crystal ball. Some horses come off the track with brewing injuries that may not be obvious in person. Even a PPE isn’t a fail safe. If you shop for an OTTB remember that any connection only knows as much as the other connection they bought the horse from told them. So it’s always best to go with a trusted source and a trusted connection that knows the horse’s whole history.
As with any horse seller there will be good stories and bad. I wouldn’t discredit either side. Some people get lucky and get everything they hoped for. Some people end up with a horse that has something pre-existing that no party knew about, and they’re stuck unwrapping layers of physical problems. There’s been enough threads on Benchmark over the years you can read both sides. When you move many horses every year, there’s bound to be a few failures. I wouldn’t phrase it as those people being the problem. Sometimes, that’s just how it is.
I will say I had a few friends looking for OTTBs in the last few years, and I suggested they check out Benchmark as most of my connections on the track have retired and I no longer maintain my own. Both came back saying they felt brushed off. I imagine in that line of work Jess deals with a lot of tire kickers, but I was sorry to see my friends feel discouraged about that.