Internet sales

In my case I purchased an air rifle from https://airrifle.co.nz and they emailed me a copy of the form with their details on it.  I simply added my details and took it to the nearest police station in Dannevirke who verified my ID and forwarded to the arms officer at Palmerston North who then emailed the dealer approving the purchase and the dealer couriered the gun directly to me.  More details on this process can be found here 

I know some dealers will only send guns to another dealer who then charges you "handling fee".   

As other dealers had told me they could only send a gun to another dealer and not directly to me I did go to the local police station and asked if this was the case before committing to the purchase.

Not sure how this works for a private person selling an air gun to another private person.  I know of at lest one person selling a number of guns on TradeMe who is saying he will only send guns using Gun City which adds $100 over and above the actual courier fee.  Of course this is not much use if the nearest gun city is over an hour away as it is in my case.

Your best bet is to go to the nearest police station and ask.  Also depending on what you are buying, there may be another forum member who would be prepared to collect the gun for you and sort out getting it to you.

I would search for the Firearms dealer network. The shops or gunsmiths in that group will do this for a modest fee. I have a guy here in Wellington that will receive a gun and won't charge anything, and to send it charges only the cost of the courier.

The silly thing I have found is that if you ask a courier company, they say it's not in their policy to send guns, but the same company is the courier between dealers.

Avoid Gun City and Hunting & Fishing if you can - go for the smaller shops.

I Used Hunting & Fishing Botany store as a receiver for a rifle transfer, and they charged an extra undisclosed $50 fee for me to uplift from the store. I wasn't told this when arranging the transfer!!
So the original $60 included arranging and booking the transfer, the cost of Aramex to collect - transit - offload, and then they wanted $50 just to hand it over... It was about 2 minutes, so $25 per minute. 

Youngs airguns will charge the courier cost and receive on behalf for nothing. Im pretty sure thats the mindset of the smaller stores - to actually help the firearms community.