I personally wouldn't ever breed hamsters of unknown genetic background. Breeding is a huge commitment, it takes quite a lot of money, time, and knowledge to do ethically and correctly. It takes months, even years of research and hard work to start up, and even when all things are done right, it can end poorly
As mentioned above, they'll also be hybrids which should never be bred due to health issues that can occur. It's also difficult to find homes, and though I don't mean this in a rude manner- but if you couldn't sex max properly, you may find it very difficult to sex the pups. This in turn, can lead to siblings breeding and then several new litters. Things can get out of hand quickly with rodent reproduction if you don't know what you're doing. If you're very interested in breeding, I'd suggest first owning several hamsters and then researching for a long time before considering getting into it
Best wishes