They use a grading scale (from PO-poor conditions to MT-mint) IMG_30561680563 109 KB IMG_30571881695 118 KB What I would do is try to interpolate data from ebay last sold and cardmarket current listings, considering that your cards fall mostly between PL and GD, with many PO, and maybe some EX
Skyshroud Poacher is really good for the price, and Arbor Elf can untap our forest that has Elvish Guidance enchanted to it
There's a huge amount, 11 Rainbow Rare VMAXes, 6 Secret Art VMAXes, 11 Secret Art Vs, 10 Secret Art Trainers, 6 Secret Art Items, 3 Secret Art Pokemon and 3 Secret Art Energies
Its regenerate ability lets you attack or block without having to worry too much
Many of our eldrazi creatures also come with ramp, either creating eldrazi scions (Catacomb Sifter) or eldrazi spawn (Awakening Zone) that can be sacrificed for ramp