Cheapest priced copy (Kamigawa: Neon Dynasty): $0.35 at Card Kingdom, near mint, their price list as of .
Mobilizer Mech 
Artifact — Vehicle · 3/4 · Uncommon · Kamigawa: Neon Dynasty · #65
Flying
Whenever this Vehicle becomes crewed, up to one other target Vehicle you control becomes an artifact creature until end of turn.
Crew 3 (Tap any number of creatures you control with total power 3 or more: This Vehicle becomes an artifact creature until end of turn.)
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
1 printing · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Kamigawa: Neon Dynasty | 65 | Uncommon | $0.35 | $0.49 |
3 rulings from Wizards of the Coast
- 18 February 2022That ability doesn't count as "crewing" a Vehicle for any ability that would trigger off of a Vehicle becoming crewed.
- 18 February 2022If an effect that causes a Vehicle to become a creature doesn't specify its power and toughness, it has the same power and toughness that it would normally have if it were crewed.
- 18 February 2022Mobilizer Mech's second ability triggers whenever its crew ability resolves, even if it is already a creature at that time.