hurui kamera wo baikyakusimasu.

を marks the direct object of the verb. In this sentence, 古いカメラ is the thing being sold, so it takes を.

• 古いカメラ = old camera
• を = object marker
• 売却します = will sell / sell

So を tells you that the camera is what the action is being done to.

In Japanese, adjectives normally come before the noun they describe.

So:

• 古いカメラ = old camera

This works much like English in this case. A Japanese -i adjective like 古い directly modifies the noun that follows it.

古い is an -i adjective. That means it ends in -い in its basic form and can directly modify a noun.

Examples:

• 古いカメラ = old camera
• 古い本 = old book
• 古い家 = old house

This is different from na-adjectives, which need な before a noun.

Japanese sentences typically put the main verb at the end. That is one of the most basic word-order patterns in Japanese.

So the structure here is:

• 古いカメラ = object
• を = object marker
• 売却します = verb

This is normal Japanese word order, even though it feels different from English.

Both can mean sell, but 売却します is more formal and more specific.

• 売ります = sell
• 売却します = sell off / dispose of by sale / formally sell

売却 is a more formal, businesslike word. It is often used for things like:

• property
• company assets
• stocks
• valuable items
• official transactions

For an everyday conversation about selling a camera, 売ります is usually more natural. 売却します sounds more formal or written.

Yes. 売却します is the polite present/future form built from the noun 売却 plus する.

The full dictionary-style verb is:

• 売却する = to sell off / to dispose of by sale

Its polite form is:

• 売却します

This kind of verb is very common in Japanese:

• 勉強する → 勉強します
• 運動する → 運動します
• 売却する → 売却します

It can mean either present or future, depending on context. Japanese does not always separate these as clearly as English does.

So 売却します could mean:

• I sell it
• I will sell it
• I am going to sell it

The exact timing usually comes from context or time words such as:

• 明日 = tomorrow
• 今週 = this week

Japanese often leaves out the subject when it is understood from context.

So this sentence could mean:

• I will sell an old camera.
• We will sell an old camera.
• Someone else will sell an old camera.

In real Japanese, omitting the subject is very common. If the speaker wanted to make it explicit, they could say:

• 私は古いカメラを売却します。

But that is often unnecessary.

Japanese usually does not mark the vs a/an directly. So 古いカメラ could mean either:

• the old camera
• an old camera

You figure that out from context.

This is very common in Japanese and is one reason translation into English can vary.

No. Japanese is normally written without spaces.

The standard writing would be:

古いカメラを売却します。

Spaces are often added in beginner materials to make the parts easier to see.

Usually, yes. 古い means old in the sense of age. It describes something as not new.

However, depending on context, an old item may also imply it is older in model or possibly used. If you specifically want to emphasize used, Japanese often uses:

• 中古 = secondhand / used

So:

• 古いカメラ = an old camera
• 中古のカメラ = a used camera / secondhand camera

Japanese uses pronouns differently from English and often omits them instead.

In English, you might say I’ll sell it, but in Japanese, if the object is already understood, it may simply be omitted:

• 売却します。

If you really need to say it, Japanese may use something like それを, but that is often less natural than just leaving it out when the context is clear.

The dictionary-form verb is 売却する, so the sentence in plain form would be:

古いカメラを売却する。

Compare:

• 売却する = plain form
• 売却します = polite form

The rest of the sentence stays the same.

It is grammatically correct, but 売却します sounds fairly formal. In everyday speech, many people would more naturally say:

古いカメラを売ります。

That sounds simpler and more conversational.
Using 売却します makes the sentence sound more formal, businesslike, or official.