Why is there a big price difference in standalone scanners and All-in-one inkjet printers?

I wanted t scan all the documents in my family and put on cloud, hence decided to buy a standalone document scanner. But to my surprise canon cheapest available scanner was 3900 INR whereas canons all-in-one inkjet printer was 2700INR which has a scanner inbuilt. Can anyone explain why this unintelligible price difference is there, and if possible guide me to buy a cheap scanner?

submitted by /u/abhinav2196
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