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So I found a version of Brickmania's Easy Eight on Bricklink Studio. It consisted of about 50 more pieces than the Brickmania official version. I ordered everything through 5 different sellers and for everything in brand new condition, it came to $65.50 including shipping on 5 letters which was around $13 of the cost. Surprisingly cheap, but it's all common colors.
Then I ordered a 50 caliber browning Machine gun and ball turret for $9.90.
While I don't have the instructions, stickers or box, grand total for the complete kit was $75.40US. I don't know where they're getting their prices from.