Just a few thoughts.
Your product is a luxury product and it rightly carries a high price tag (for a jumper). However, your brief descriptions don’t go into a lot of detail. I noticed that you mentioned in one that you spin the yarn yourself, which, as Sasha says, would appeal to a certain kind of lifestyle that also has lots of money to spend. You need to have more detail about all of your processes on all of your listings so that there is no chance that a prospective customer will miss it. You might also want to mention that Alpaca wool was the preserve of Inca princesses back in the day. I’m not sure if it was actually forbidden for ordinary folk to wear it, but it has always been considered luxury yarn.
Your photographs could also do with a bit of tweaking to bring out the best in your knitwear. I think that showing the jumpers on hangers is not very flattering to them as it makes them stretch around the neck and shoulders in a way they would not do if they were being worn. They would look much better being modeled by somebody, and it would be easy then to show how they look in different sizes. It would be nice to show them flat and also a close up of the yarn to see the texture. You could finish with some “work in progress” shots too.
I have favourited one of your jumpers in the hope that it will appear on the front page.