It's not like me to laugh at things like this, but this ebay listing really made me chuckle. The best part is the question the seller received and the answer. In case you can't or don't want to log in to read the dialogue:
Q: Is there something particularly rare about this computer specifically that would warrant a price of $900 when 17" core 2 duo imacs are going for $650? If not, this computer is worth about $300-400 max. I am interested and would like to make a realistic offer, but I'm worried you'll reject it since you're expecting much too high a price.
A: This iMac is in very good condition. You may find cheaper one but may not have a condition like this one. Sure, you can buy the core 2 duo one for 650, but this one I am asking for $899 firm. I just don't want to sell it any less. If you are not serious to buy this one for collection, do not bother making an offer. This one deserves a real owner that appreciate and cherish its value. Thanks.