It's cheaper to buy Japanese cameras here than it is to buy them in Japan.
この場合、次のような言い方ができますよ。
ーIt's cheaper to buy Japanese cameras here than it is to buy them in Japan.
「日本で買うより、ここで日本製のカメラを買った方が安い」
to buy Japanese cameras here「日本製のカメラをここで買う」
このようにhere は to buy Japanese cameras とセットにすると良いですよ。
「日本で買うより」なので、than it is to buy them in Japan とすると良いでしょう。
ご参考まで！
Buying a Japanese camera here is cheaper than buying one in Japan.
"日本製のカメラが日本で買うよりここで買う方が安い"
- Buying a Japanese camera here is cheaper than buying one in Japan.
- It's cheaper to buy a Japanese-made camera here than in Japan.
日本で買ったほうが高い
- It's more expensive to buy a Japanese camera in Japan compared to here.
- Buying a Japanese-made camera is more expensive in Japan.
カナダ 
アメリカ合衆国 
