They sell their rims at the usual price between $140-$280 each.
So a wheelset at about $400 probably have poor quality spokes/nipples and hubs.
You get what you pay for, and if you don't ride a lot you may ride them happily for years

It is like an optional insurance.
If you buy from a seller with a good reputation, it will be more expensive, but you are covered in case of troubles.
Here... maybe, maybe not.