If you trust the breeder, I don't see an issue with labeling them as 50% hets. As long as you're honest with any questions a buyer may have, I don't think you should have any problems.
Plus it makes things easier of there's an oops, suddenly albino hatchling for them down the line when they try to produce hets. Lol
Now my issue personally is charging for them. I had some 66% het OGs that I sold last year and I pretty much just charged for the visuals since I couldn't guarantee the OG. A small bump in price isn't bad. But pricing like an actual het? Nono.
When the new genes hit is when it gets frustrating... Like seeing 700$ for a normal possible het sunset?? Wt? ...