If you want a clean card but prefer not to spend over $100, you can settle for an LP copy, which should cost you closer to $62.99, while a damaged copy will only run you about $15 if the condition doesn't matter.
There is actually a perfect ten copy listed on eBay for $200,000 at the time of writing, although despite there being 90 people watching the listing, none seem willing to bite at that price
Like most Magic: The Gathering cards, the value of Exsanguinate 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 (Foundations)
Machop and Machoke are both supposed to be grey, and Machamp is supposed to be blueish-grey
Fun fact: internally, we referred to this issue as the "Thalia Problem"