My favorite is A. Hardy Cognac Noces d'Or 50 Yr Old 750ml (second picture) which sells for around $200. It is the same cognac which comes in A. Hardy Captain Noces D'Or Decanter Cognac 50 Years Old 750ml which sells for as much as $1600.
Pic of the Captain.
Pic of same cognac with regular bottle
Amazing how much they charge for a fancy decanter. Go for the regular bottle and you can enjoy a 50 year old cognac for just over what many of the XO's go for. A real nice special occasion drink for cognac drinkers.