The short answer is “no.”
Many OCDs can easily be treated surgically, and if the surgery is done early and by an experienced surgeon the long term prognosis generally is excellent.
As a breeder of large horses, OCDs are going to happen sometimes no matter what. Breeders of large horses who say they “never” have had an OCD are either lying or simply don’t do screening X-rays. Some bloodlines (IME bigger horses) are worse than others. IMO, OCDs cropping up in young horses is a PITA and costs some money, but otherwise is generally NBD in terms of the horse’s competitive career.
I would absolutely purchase a two year old that had OCDs removed uneventfully and was fully recovered. But, in general, I wouldn’t go out and buy a horse with untreated OCDs. Why? Surgery can be a risk, plus it is work to do the layup afterwards. I would prefer that the seller be responsible that risk and inconvenience.
As far as resale, most higher end WB buyers are savvy to the fact that a history of an uncomplicated OCD removal is NBD. They will probably be X-raying the horse anyway and will care more about those films and the horse’s current soundness than the history of the OCD. I could see buyers balking if the horse had surgery but then had not done anything to “prove” its soundness afterwards.
FWIW, a horse with a history of OCD surgery absolutely CAN have a squeaky clean PPE with pristine X-rays. I’m not a vet, and an experienced surgeon could comment with more detail on that, but none of the youngsters I’ve ever seen operated on have had radiographic evidence of the surgery afterwards. Obviously, the history of the surgery should be disclosed in an honest fashion, but many times it isn’t. However, when a horse is well into its competitive career the history of uncomplicated OCD surgery as a 1-2 year old is likely irrelevant anyway.
Now, if someone offered me an incredibly well bred youngster that I really liked at a ridiculously low price, then it might be worth it to me to shoulder the expense and risk of surgery. Obviously I would have my surgeon review things first to make sure that he agreed that a good outcome was likely based on the size and location of the lesion/s and the age of the horse.