Buying the cheapest possible ‘thing’ you can find is often not such a good idea.
Especially with motors, Find a middle-price-range brand-name motor that has a business behind it that looks trustworthy has reviews etc.
The easiest way to make motors “cheaper” is by using less copper, smaller magnets, smaller stator & other cheaper materials. Like cheap bearings etc. All those items are critical to performance & should never be compromised to achieve a lower cost. You should simply buy a smaller 6354 motor that already has a lower cost.
Also note, Motors are extremely heavy for their size, which means sending them back for a repair etc. isn’t always viable due to the shipping costs. Especially for overseas vendors.
The occasional stone will break them, but if you have lots of breakdowns, your drivetrain is probably designed wrong. My question was actually legit … I own both if that was a question.