The HP Papers cheapest option is my recommendation if you want your proxies to be almost like a prototype
Creatures (24) 2 Kira, Great Glass-Spinner 4 Lord of Atlantis 4 Merrow Reejerey 4 Silvergill Adept 4 Cursecatcher 4 Coralhelm Commander 2 Phyrexian Metamorph Lands (21) Spells (15) Sideboard Hat tip to Stifle, by the way
Most of the most valuable Magic cards are those found on the "Reserved List", a list of cards Wizards of the Coast has promised to never reprint
Outside of invitation drops, Best Buy does run regular restocks
While it wont prevent your opponents sorcery-speed removal, this card will do great work allowing you to set up your board without fear of your pieces being picked apart as you go
Ich-Tekik, Salvage Splicer Ich-Tekik, Salvage Splicer is much like Slurrk, All-Ingesting, but the Salvage Splicer can be played a bit earlier, golem typal payoffs could mean upside, and putting artifacts into the graveyard often happens far more than creatures going to the graveyard