Target has various original Splatoon amiibo on clearance, all of which provide in game armor sets for Splatoon 2. Examples include:
Inkling boy, girl and squid 3 pack for $17.50 (50% off)
https://www.target.com/p/nintendo…nk=s
Inkling girl for $4.48 (66% off)
https://www.target.com/p/nintendo…nk=s
Inkling Boy for $4.48 (66% off)
https://www.target.com/p/nintendo…nk=s
Bout as cheap as it gets for Nintendo Amiibo