Oh so you're buying for an increase in value. right? I thought you said that. But then if only you two have all four, you will not be willing to sell, therefore there will be no established secondary market value, therefore no one will ever know. Maybe you should buy more sets of 4 so you can make all those things happen. But I want to warn you that you better get them at 1/2 off or you'll loose your shirt and your shoes. LOL
Jake