Given you have a strong preference simply ask the seller which courier they use, or if they can use Courier Post.  If they don't reply or can't use Courier Post, then find another seller. Not the end of the world. Of course, if they say they do, and then they don't, that would earn them a blue from me at best.  

You need to do it from the "old look", go to an invalid page, like this one will do... https://www.trademe.co.nz/wrongturn and then paste the P number into the search bar there. You can only search your own P numbers (you are buyer or seller).

It is what it is unfortunately.  Depends a lot on the items you are selling, people seem to often not really understand that the price of an item does not reflect the price to ship an item.  A $1 item with $10 shipping is seen as outrageous, while a $100 item with $10 shipping is seen as perfectly acceptable. If you are selling mostly items of a good value then a flat rate average shipping is a good way to go.  Unfortunately for me it's not the case, if I offer flat rate for both urban and rural (as I have in the past when it was much cheaper) then I get a lot of rural buyers spending a dol...

Not possible to leave feedback when you didn't purchase it on Trade Me. As you paid in cash, outside of the Trade Me process, there's nothing Trade Me can do for you in this transaction either. Your best and realistically only course of action if the seller is not helpful, and you believe you can show that the vehicle was misrepresented, is to take them to the Disputes Tribunal.

From the webinar:   "over the next few months we're going to start to phase out a free text option for buy now only listings through our professional seller listing channels"   My expectation here is that this means you won't be able to use the free-text (ie not-new-template) shipping options in My Products, TradeVine and any other tools using the API.        

They didn't take any questions, what you see is exactly how it went, wasn't live or anything just a pre-recorded thing.

You can only do it using a listing tool such as TradeVine or your own tool developed through the API.  I don't think you can do it "natively" or even in My Products.  

They have fixed the problem now.  

Hmm.  And also, it doesn't seem to work.  I can't save them :-/

Looks like you have to select "Other" as Carrier then you can now choose from Urban and Non-Rural options.  Eh, I don't suppose it matters that it's "Other", not sure that's shown anyway.