Couldn't even begin to put my entire collection into the system.
Looking at my decks, the most expensive one is Arixmethes. It is listed at $5226. This is because it contains
The Tabernacle at Pendrell Vale. It is currently valued at $4489. (OMG, when did that happen?)
I seldomly look at the value of cards. Only when I am trying to sell some do I bother. Whenever I drop a really old card during a game, someone invariably asks "Do you know what that card is worth?" I never do. My
Tropical Island cost me $2.50. The price of a pack of Revised back in 1994. My
Gaea's Cradle cost me $2.99. The price of a pack of
Urza's Saga back in 1998.