either

[arzgol]

　
It is not as expensive as playing tennis or ice hockey either.

Is my sentence proper English?

Thank you so much for your reply.

[Tdol]

What came before this sentence? Without the full context, it's hard to say whether either is correctly used here.

[arzgol]

Wrestling is less dangerous than boxing or judo. Besides that , it requires lots of strength because a person should be strong enough to push the shoulder of the other opponent to the floor.

[emsr2d2]

Wrestling is less dangerous than boxing or judo. Besides that , it requires lots of strength because a person should be strong enough to push the shoulder of the other opponent to the floor.

If that's what came before the sentence you originally quoted, then it's fine and makes sense.

I have a feeling that theoretically it should be "It's also not as expensive as tennis or ice hockey" but "either" is used a lot by native speakers in this situation.

I like a lot of green vegetables. Broccoli is one of my favourites becuase it is full of vitamins and it's easy to cook. It's not as expensive as asparagus either.

I want to buy a Ferrari. They're fast and exciting, not to mention sexy. They're not as flashy as Porsches either.