Cheaper?
The problem is twofold.
The plastic case is fragile and the bubble wrapper is bulky.
If you use thin stiff card (not corrugated) on both sides of the case it will be less likely to get cracked.
And then you can use a poly or even paper envelope and ship Letter Mail within Canada because you are less than 2cm thick.
For more valuable CDs, you could cross check the cost of Registered (letter rate +$9.75) which is tracked and insured within Canada against the cost of Regular/Expedited Parcel.
You do have your Solutions for Small Business account right?
https://www.canadapost-postescanada.ca/cpc/en/business/small-business.page?
For USA the promotional discount on Tracked Packet USA has been extended to March. Fingers crossed.
FWIW - Most people are honest.
You are not required to use tracking, but be aware that if the customer claims Item Not Received your only response is to refund promptly.
Putting the very minimal cost of such Claims into your selling price is called Cookie Jar Insurance- basically self-insurance against problem transactions.
