Welcome to the wonderful world of bearded dragons, I hope to do some business with you soon. I'm sure if your dragons are as good as I hear we'll be speaking to each other soon.
Good call on finding the burm a home, if it can live a normal (minus sight) life why kill it? Of course you'd have to limit the people that might take it to only those that won't breed it and maybe you should even have a simple 2 sentance contract to that effect. Not sure I agree with $4000 for it, it really should just be given away to the first available home or at worst you can charge normal albino burm price to cover your expenses.