see, now if Im breeding, to keep a few back for ferreting, then none would get sold at such an early age, they are all handled daily to ensure non biters, but then, each in turn is taken out, normally with a parent, and used whilst ferreting, keeping records of what ferrets worked well, did'nt shy away from holes,hands etc
thus I keep the ones I want, and sell the surplus, always tell the new owner, if they have been out, and how well/poor they did, most ferts dont get good at ferreting until their 2nd year, but at least it gives me a head start, if your selling at 8 weeks plus, the only fact