Value isn't a linear scale. Something's only worth what someone's going to pay for it.
That's why I laugh at the ads for the ugly new veileds - they make it seem like a money making deal. If Holand can sell those for $5,000 a piece, then they were worth $5,000 a piece to the buyer.
Last April, I sold this male:
for a LOT of money.
I was not going to sell him. I was at a reptile show, using him for my demonstrations. One guy, who was well informed, wanted him. He didn't want the other veileds, he wanted HIM. I told him I wouldnt' sell him. I told him he could get an entire setup with a chameleon online for less than that. I thought about how I could reinvest the money in my deremensis and melleri, and I caved.
That guy was worth a lot.
Personally, I wouldn't pay for those translucent veileds. They're not worth as much as a nice veiled, not to me, anyway.
An albino parsonii? I think, the majority of chameleon owners would probably put its value BELOW that of a normal, healthy parsonii. Rarity isn't the sole factor in determining value. Although, since parsonii are not as big sun worshippers as veileds, skin problems might not be a problem at all in captivity.