MTG Salvation

Hey guys. I enjoy looking at old charts of card's prices (cuz I'm a geek :p) and I found it hard not to notice one thing. For a massive percent of the card, they spiked right around the time born of the gods was released. Why is this? Was there some big event? I get that it may have been around when the pro tour happened or something but seriously, it's uncanny how many cards shot up in price. Some examples:
http://www.mtggoldfish.com/price/Coldsnap/Dark Depths#paper
http://www.mtggoldfish.com/price/Modern Masters/Tarmogoyf#paper
http://www.mtggoldfish.com/price/Eighth Edition/Blood Moon#paper
http://www.mtggoldfish.com/price/Future Sight/Grove of the Burnwillows#paper
http://www.mtggoldfish.com/price/Mirrodin Besieged/Blightsteel Colossus#paper
http://www.mtggoldfish.com/price/Morningtide/Scapeshift#paper
http://www.mtggoldfish.com/price/Champions of Kamigawa/Azusa Lost but Seeking#paper
http://www.mtggoldfish.com/price/Champions of Kamigawa/Boseiju Who Shelters All#paper
http://www.mtggoldfish.com/price/Magic 2012/Sorin Markov#paper
http://www.mtggoldfish.com/price/Conflux/Knight of the Reliquary#paper

etc...

Quote from aeonflux »

The problem is, that the set is horrible.

There are two valueable cards: Brimaz and Courser and Courser already got reprinted two times in Clash Packs.

Brimaz has small potential to grow as he only sees minimal play. But maybe he can attract some interest because he is a legendary cat.

I wouldn't invest in this set, but if you force me at gunpoint to spend my money on it, I'd probably buy the Temples and Xenagos.

Holy cow. Did you even read his post?

GP Richmond is probably what you're referring to. Modern getting that kind of a showcase on the heels of the original Modern Masters lead to a lot of moderns staples being bought up. As the value of modern staples went up, people turned their modern cards into legacy cards and hence spikes in the dual lands, and things like Dark Depths.

Basically it was when the people with the money realised that a lot of older cards were underprinted and in short supply.

SCG put everything up by nearly double and prices have been that way ever since.