How much did you buy the wallet for? vs How much did you buy the wallet?

I found this sentence "How much did you buy the wallet?" in my English textbook. However, it feels a little bit strange to me. Shouldn't it be something like:

How much did you buy the wallet for?

For how much did you buy the wallet?

Aside from being idiomatic or not, is this sentence grammatically correct?

"How much did you buy the wallet?" isn't grammatically incorrect, but it doesn't make any semantic sense. It essentially means: "To what extent/degree did you buy the wallet?" This question is nonsensical, so presumably they made a mistake by not including the "for."