question on trade window..

[Oppelir]

I paid for 4 locked and counted 4 before confirming, but in the chatlog after the trade, it showed as only 3 lines of locked crates given. Does this mean that he only traded me 3, removed a crate somewhere in the process?

[Zylx]

Did you check your inventory?

[Oppelir]

Ya I did, but unfortunately, I can't remember the exact number of locked crates I had before the trade T_T

[basketholic209]

I paid for 4 locked and counted 4 before confirming, but in the chatlog after the trade, it showed as only 3 lines of locked crates given. Does this mean that he only traded me 3, removed a crate somewhere in the process?

Yup, unfortunately for you.
Common scam scheme.