Best/inexpensive place to buy Schick injector blades

Starting using my Schick Adjustable razor for my head shaves with excellent results, so I would like to get some more blades for it as I only have one container/pack left. 
I know I can find them on ebay, and found a website in Canada, but I was hoping to get them for a better price than $1+/blade, if possible. Any help would be much appreciated.

I always get my B-20 blades from Connaught, they have nice price.
https://connaughtshaving.com/spb20.html

CK89, thank you and that is a very good price.

If you buy the Schick branded blades figure around $5 USD for a pack of 7 blades new should be about as low as you can find those blades.

If you buy the Schick branded blades figure around $5 USD for a pack of 7 blades new should be about as low as you can find those blades.

Thanks. Connaught Shaving has the best prices on the Schick Proline B20, from Japan, but, unfortunately, they don't ship them to Canada. 
I'll have to buy them on ebay where the price is quite reasonable.

Speaking with no experience, I have read that you have to load the B-20s yourself into the injector. Someone please confirm or correct me.

Speaking with no experience, I have read that you have to load the B-20s yourself into the injector. Someone please confirm or correct me.

It doesn't have key. I am using personna key to add B-20 blade into razor.

Speaking with no experience, I have read that you have to load the B-20s yourself into the injector. Someone please confirm or correct me.

I load them into an old Schick injector case to use.

Speaking with no experience, I have read that you have to load the B-20s yourself into the injector. Someone please confirm or correct me.

I load them into an old Schick injector case to use.

That is what most folks do and what I plan on doing once I receive them.

If you buy the Schick branded blades figure around $5 USD for a pack of 7 blades new should be about as low as you can find those blades.

Thanks. Connaught Shaving has the best prices on the Schick Proline B20, from Japan, but, unfortunately, they don't ship them to Canada. 
I'll have to buy them on ebay where the price is quite reasonable.

I should clarify since there are 4 distinct Schick injector blades on the market. The ones I am referring to come in a yellow blister pack they are made in China and are sometimes informally called Chicks because of that. Then there are the Japanese made Schick blades that you can only get from Japanese sellers. The packaging is different from the standard Schick blades. Then you have the Proline B-20 blades that are designed for things like shavettes but also work with injector razors. Finally you have the Schick II twin injector blades that you can only get from Japanese sellers. These are all made by Edgewell which owns the Schick brand.

The non Schick branded injector blades that all the retailers sell are made by Accutec and go under the Personna brand primarily or rebranded depending. They are easy to spot rebrand or not by the key which is a plastic white key while the Schick branded blades come in metal keys.

Lastly not all blades are created equal. The Schick branded blades tend to be much sharper than the Personna ones. I would suggest having a key of both to figure out which one suites you. Also if the razor is not performing up to expectations like in the case of using the less sharp Personna blades sometimes using a sharper blade like a Schick will make a world of difference.