i do agree with that, many higher level and older spells do require some very exotic and rare items. But thats the problem with those spells, they were made for a different time when that kind of thing was more abbundant then it is now.
And i do agree that much of the craft today is treated like a children's toy and i hold nothing against you for treating people like that children.
Still there are better methods for him to take rather then spend such an ammount of money on such an exotic and odd item. There are better methods which require him to do some serious time commitment instead of financial commitment, and it was just for your safety fragarach that i offer this because it does seem like a scam in ways... unless honesty is a well practiced, seasoned, and knowledgable practitioner of the craft.