I just looked at the prices for the duel decks I have and was surprised at how much the price of the cards increased. I have the Ajani vs. Nicol Bolas, the Izzet vs. Golgari, and the Tibalt vs. Sorin. I was disappointed that I had already traded away the Nicol Bolas deck, and my ($10) Sorin was stolen from me. But, the duel decks, which were $25 when they came out, are now about 40 dollars, if I sold the cards separately at the average price. Yay for profits!
Yeah sliver deck is worth $80-100 opened
I have 40/60 of the cards, people who want that deck won't trade me $30-40 for basically whole set minus some land and sliver overlord
That's the irony of these values: people won't pay for them most of the time, even the lowest