Amazon don't stock the item. Some of these small.businesses don't have much flexibility, they may even have a restricted contract with one carrier, its just not worth bothering with one off transactions. They get paid before they post the item, so it can't be fraudulent.
PS it's a model kit from Vanguard,, Admirals Barge. it's my third build, and I hope to sell this one, just to fund the next build. Its a nice hobby, but I can't keep them all.
https://vanguardmodels.co.uk/products/33-royal-admirals-barge
Builds are often on YouTube if anyone wants to have a go, you need to be very patient. This model is relatively simple and not very expensive. Some of them retail at £1000!