Best/inexpensive place to buy Schick injector blades

I would also keep an eye out for NOS vintage Schick branded blades made in the 80s and up to the 2000s. They are really good and sometimes can be had super cheap. The boxes usually will have a date on them and say made by Warner Lambert. If they look like the modern packaging the way to tell is they will say made in the USA if they are vintage.

Here is what the packaging looks like for the 4 types of Schick branded injector blades



Left to Right
Chinese Schicks or chicks
Japanese Schicks
Proline B-20
Schick II twin blades

Thank you for taking the time to provide the information and I was already familiar with all of the blades.
I've tried both the Chinese and Japanese made ones and prefer them.
Had just been so long since buying them 10 years ago.

You can also get Schick Twin blades from Amazon Japan, they are shipping to USA but don't know Canada.
https://www.amazon.co.jp/-/en/Schick-Inj...r=8-5&th=1

Buying these blades from ebay is too expensive...

...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.

Most seem to think the Schicks (both 'Chick' & B20 at least) are smoother to them and I would agree. However, modern Personna injector blades "shine" in certain injector razors IMO, but the shaver has to determine if so for them. I have tried all the old "Golden Age" NOS injector blades and IMO the Gillette Platinum Plus injector blades were the best, besting even Personna 74 ones. That said, for me the B20 blades are the best modern injector blades, BUT (and it's a big but) the incremental improvement over modern "Chick" blades is so small, at least to me, as to not warrant the extra cost here in the USA nor hassle of importing from Japan cheaper. 

The "Chick" injector blade is simply the best "all 'rounder" in that it works very good in all injectors and great in some. YMMV.

...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.

Most seem to think the Schicks (both 'Chick' & B20 at least) are smoother to them and I would agree. However, modern Personna injector blades "shine" in certain injector razors IMO, but the shaver has to determine if so for them. I have tried all the old "Golden Age" NOS injector blades and IMO the Gillette Platinum Plus injector blades were the best, besting even Personna 74 ones. That said, for me the B20 blades are the best modern injector blades, BUT (and it's a big but) the incremental improvement over modern "Chick" blades is so small, at least to me, as to not warrant the extra cost here in the USA nor hassle of importing from Japan cheaper. 

The "Chick" injector blade is simply the best "all 'rounder" in that it works very good in all injectors and great in some. YMMV.

You can also get Schick Twin blades from Amazon Japan, they are shipping to USA but don't know Canada.
https://www.amazon.co.jp/-/en/Schick-Inj...r=8-5&th=1

Buying these blades from ebay is too expensive...

That is about what I paid for the same pack of them about a year and a half ago. Great price and even though the upfront cost may seem high they last a lot longer than any blade I've used. The one I currently have loaded in my N1 injector has 21 shaves on it so far. That also includes 5 passes for every one of those shaves. I expect it to make about 25 shaves for me and if I did less passes well past 30 shaves.

You can also get Schick Twin blades from Amazon Japan, they are shipping to USA but don't know Canada.
https://www.amazon.co.jp/-/en/Schick-Inj...r=8-5&th=1

Buying these blades from ebay is too expensive...

There is also an ebay seller that has what maybe these blades at about the same price. I can't say for sure since they have the wrong blades pictured but do have both styles of single or twin blades on seperate listings. These are buy it now priced listings not auctions.
https://www.ebay.com/itm/Schick-JAPAN-In...SwltBgE2iz

Here is the single blade listing.
https://www.ebay.com/itm/Schick-JAPAN-In...SwkztgE4mG