I've seen this kind of attitude from sellers many times before. Whilst I am a firm believer that people are free to ask whatever they want for something, I don't believe it is right for them to coerce potential buyers with what is effectively blackmail. I for one am not going to be bought by this kind of tripe and as far as I'm concerned he can do what he likes with the item as destroying it only serves to bolster the value of my little collection. As for the seller, the best thing I can think of doing is giving him the good old single finger salute.