In questo negozio c’è già la nuova collezione, ma io aspetto i saldi.

Because in is the normal preposition for being in/inside a place.

• in questo negozio = in this shop
• questo negozio = this shop

Italian often uses in with places such as:

• in negozio = in the shop
• in banca = in the bank
• in ufficio = in the office

You could also hear in questo negozio translated naturally as at this shop/store in English, even though the Italian literally uses in.

C’è means there is or there’s.

It is made of:

• ci = there
• è = is

When ci comes before è, it becomes c’è.

So:

• c’è la nuova collezione = there is the new collection / the new collection is here

The apostrophe shows that ci has been shortened before è.

Because la nuova collezione is singular.

• c’è = there is
• ci sono = there are

So:

• c’è la nuova collezione = there is the new collection
• ci sono i saldi = there are the sales

If the noun were plural, you would need ci sono:

• Ci sono già le nuove collezioni = The new collections are already here

Italian uses definite articles much more often than English.

So la nuova collezione is very natural, even where English might say:

• the new collection
• the new season’s collection
• or just new collection, depending on context

In Italian, leaving out the article here would sound unnatural.
La nuova collezione refers to a specific collection that both speaker and listener can identify from context.

Già means already.

In this sentence:

• c’è già la nuova collezione = the new collection is already here

Its position is normal and natural. Italian adverbs like già often go near the verb:

• È già pronto = It is already ready
• Ho già mangiato = I have already eaten

You could sometimes move già for emphasis, but c’è già la nuova collezione is the most straightforward order.

Usually, no. Italian often drops subject pronouns because the verb ending already shows who the subject is.

• aspetto already means I wait / I’m waiting
• so aspetto i saldi would be enough

Adding io gives emphasis or contrast. Here it sounds like:

• but I’m waiting for the sales
• but as for me, I’m waiting for the sales

So io is not grammatically required, but it helps create contrast with the first part of the sentence.

Because Italian, like English, often uses the present tense for something current or planned.

Here aspetto i saldi literally means:

• I wait for the sales
• more natural English: I’m waiting for the sales or I’m going to wait for the sales

The idea is that this is the speaker’s current attitude or plan.
Italian does not need a future tense here.

Compare:

• Aspetto l’autobus = I’m waiting for the bus
• Aspetto i saldi = I’m waiting for the sales

I saldi means the sales, especially seasonal markdowns in shops.

In Italy, saldi usually refers to official sale periods, such as winter or summer sales.

Grammatically:

• il saldo = the discount / the markdown / the sale price
• i saldi = the sales

So in this sentence, the speaker means they do not want to buy from the new collection at full price; they want to wait until the sale period starts.

Because in Italian, articles are often used where English may leave them out.

So:

• aspetto i saldi = I’m waiting for the sales

The article i is masculine plural, agreeing with saldi.

You will often see this with general, well-known things in context:

• Aspetto l’estate = I’m waiting for summer
• Aspetto i saldi = I’m waiting for the sales

English is more likely to omit the article in some cases, but Italian usually keeps it.

Yes. Negozio is the general word for shop or store.

Depending on context, it could be:

• a clothes shop
• a shoe store
• a small retail store in general

Since the sentence mentions la nuova collezione and i saldi, it strongly suggests a fashion or clothing shop.

Yes. Both are correct, but they have slightly different feels.

• aspetto i saldi = I wait / I’m waiting for the sales
• sto aspettando i saldi = I am waiting for the sales

The version with stare + gerundio puts more focus on the action being in progress right now.
The simple present aspetto is more neutral and is very common in Italian.

In this sentence, aspetto i saldi sounds perfectly natural.

Usually, yes in this kind of context.

Collezione can mean collection in a broad sense, but in a shop context it often means:

• a new fashion collection
• a seasonal clothing line
• a new range of items

So la nuova collezione in a negozio will usually be understood as the latest season’s products, especially clothes or accessories.