Hi – Had a look at the website. There is quite a bit that can be done to improve the the user interface on the website. I think it would be worth testing Google Shopping and Facebook Ads, although the individual item value and presumably the margins are quite small. I imagine that people purchase more than one at a time?
I would also suggest doing keyword research and seeing what terms people are searching for that match your product. You could then build out a content strategy on your website around that.