Cheapest priced copy (March of the Machine Commander): $0.49 at Card Kingdom, near mint, their price list as of .
Sandsteppe War Riders 
Creature — Human Warrior · 4/4 · Rare · March of the Machine Commander · #39
Trample
At the beginning of combat on your turn, bolster X, where X is the number of differently named artifact tokens you control. (Choose a creature with the least toughness among creatures you control and put X +1/+1 counters on it.)
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
2 printings · $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| March of the Machine Commander | 39 | Rare | $0.49 | — |
| March of the Machine Commander | 126 | Rare | $0.49 | — |
2 rulings from Wizards of the Coast
- 14 April 2023A token’s name is its subtypes plus the word “Token” unless it’s copying another object or it was given a specific name by the effect that created it. For example, Myr tokens are named “Myr Token,” and they have a different name than Phyrexian Myr tokens, which are named “Phyrexian Myr Token.”
- 14 April 2023To determine the number of differently named artifact tokens you control, count each artifact token you control once, but only if its English name isn’t exactly the same as another artifact token you’ve already counted this way.