I wouldn't waste the time/money proving out poss het of something that common personally. If I had an outstanding male with one of those as visual and they would make awesome babies even with a normal female, having those as extra wouldn't hurt any, but it's not something I would aim for. I wouldn't pay a penny more for a poss het than a normal either, even 100% het I'm hesitant to pay extra for unless it's a highly reputable breeder.