Söluaðilinn samþykkir verðið þannig að við göngum frá kaupunum.

Söluaðili means seller, dealer, or sales agent, depending on context.

The ending -inn is the definite article attached to the noun, so:

• söluaðili = a seller
• söluaðilinn = the seller

In this sentence, söluaðilinn is in the nominative singular because it is the subject of the verb samþykkir.

You can also think of it as a compound:

• sala = sale
• aðili = party / person involved

So söluaðili is literally something like sales party/person.

Samþykkir is the 3rd person singular present tense of samþykkja, which means to accept, to approve, or to agree to.

So:

• ég samþykki = I accept
• þú samþykkir = you accept
• hann / hún / það samþykkir = he / she / it accepts

Since the subject is söluaðilinn (the seller), Icelandic uses the 3rd person singular form:

• Söluaðilinn samþykkir = The seller accepts / agrees to

Verð means price.

The form verðið means the price:

• verð = a price
• verðið = the price

Here it is the direct object of samþykkir, so the sentence is saying that the seller accepts the price.

Because verð is a neuter noun, its nominative and accusative singular are the same apart from definiteness:

• verð = price
• verðið = the price

So samþykkir verðið means accepts the price.

Þannig að is a very common expression meaning:

• so
• so that
• with the result that

Literally, þannig means like that / in that way, so þannig að is roughly in such a way that.

In this sentence, it connects the first idea to the result or purpose of the second:

• Söluaðilinn samþykkir verðið þannig að...
• The seller accepts the price so / so that...

In natural English, you might translate it as so that we can... even though Icelandic does not always need an extra word like can.

Yes, if you look at the parts separately:

• ganga = to walk / go
• frá = from

But together, ganga frá is an idiomatic expression. It often means:

• to finish
• to settle
• to put in order
• to conclude / finalize

So in business or transaction language:

• ganga frá kaupunum = finalize the purchase / conclude the deal

This is very common in Icelandic: a verb + preposition combination can have a meaning that is not fully predictable from the individual words.

This is one of the trickier parts.

1. Why plural?

The noun kaup is often used in the plural when it means purchase, deal, or transaction:

• kaupin = the purchase / the deal

Even though English often uses a singular word, Icelandic commonly uses this plural form.

2. Why dative?

The expression ganga frá einhverju takes the dative case.

So:

• base form: kaupin
• dative plural definite: kaupunum

That gives:

• ganga frá kaupunum = finalize the purchase / settle the deal

So the ending is doing two jobs at once:

• it shows the noun is definite (the purchase)
• it shows it is in the dative plural

In this sentence, the form göngum does not clearly show the difference, because for ganga the 1st person plural present indicative and 1st person plural present subjunctive are the same in form:

• við göngum = we go / we walk / we finalize
• and the subjunctive form is also við göngum

So from the form alone, you cannot tell.

After þannig að, Icelandic can express either:

• a result
• or a purpose

In practice, what matters most for a learner here is the meaning:

• þannig að við göngum frá kaupunum = so that we finalize the purchase / so we can finalize the purchase

Because þannig að introduces a subordinate clause.

In Icelandic main clauses, you often see verb-second word order. But in subordinate clauses, the pattern is usually more like:

• conjunction + subject + verb

So:

• þannig að við göngum frá kaupunum

is the normal order.

That is why við comes before göngum here.

English often says:

• so that we can finalize the purchase

Icelandic does not always need to say can explicitly. The idea of result or possibility is often already clear from the context and from þannig að.

So:

• þannig að við göngum frá kaupunum

can naturally mean:

• so that we finalize the purchase
• so that we can finalize the purchase

If you wanted to make the can idea more explicit, you could say:

• þannig að við getum gengið frá kaupunum

That is also correct, but the original sentence is more compact and natural in many contexts.

Yes — that is a very good way to learn it.

It is useful to remember the whole phrase:

• ganga frá kaupunum = to finalize the purchase / close the deal

More generally, also learn:

• ganga frá einhverju = to finish / settle / put in order / finalize something

This helps because the meaning is idiomatic. If you only translate word by word, it may not make sense. Learning the phrase as a unit will make it much easier to recognize and use naturally.