попробовать:
=ARRAYFORMULA({"seller"; IFNA(VLOOKUP(F3:F&G3:G, {A:A&B:B, C:C}, 2, 0))})
![0](https://i.stack.imgur.com/MpoUK.png)
или в F2:
=ARRAYFORMULA({QUERY(A1:C,
"select A,min(B) where C is not null group by A", 1),
ARRAY_CONSTRAIN({"seller"; IFNA(VLOOKUP(TRANSPOSE(QUERY(TRANSPOSE(QUERY(QUERY(A2:C,
"select A,min(B) where C is not null group by A", 0),
"offset 1", 0)),,999^99)), {A2:A&" "&B2:B, C2:C}, 2, 0))}, COUNTA(QUERY(A1:C,
"select A,min(B) where C is not null group by A", 1)), 1)})