Like most Magic: The Gathering cards, the value of Magus of the Moon depends on a few consistent factors: its rarity, the printing and finish (regular or foil), its physical condition, and the set it was printed in (Future Sight)
The Japanese and International versions are treated differently, with the OCG (the Japanese game played in Japan and other Asian regions) maintaining its own list
I think the ballpark estimate is like 35,000 to 40,000, which is a lot to find in a plastic tub in the corner of a room. After a few years not really doing a lot, Shaws shop closed in 2012 to focus on selling trading cards via eBay
So it's important to check other aspects of the card, such as printing, materials, and artwork
The strategy revolves around cheap, efficient creatures and disruptive spells, and it aims to win by applying pressure while it slows opponents down with counters or bounce effects
Grading isn't free