I said your deck had to be worth as much as a laptop. So consider a 60 card deck, and that a decent laptop costs $600.
$10 on average per card. I remember in Invasion/Odyssey type 2, a control deck which used 4x shadowmage infiltrator, 4x spectral lynx, 2x dromar the banisher, 4x undermine, 4x absorb, 4x counterspell, 4x fact or fiction, some other cards, and 4x underground river, 4x adarkar wastes 4x caves of koilos, 4x salt marsh (UB tapland), the UW tapland, and I believe 4x city of brass, along with a couple of other rare lands.
Also see: Monowhite control in Onslaught. 4x decree of justice 2x akroma 4x windborn muse 4x dawn elemental 4x wrath of god, essentially it was every single white chase rare put together with a bunch of plains and temples of the false god. It cost a hilarious amount of money to assemble.