It's better to revamp your website by changing the overall theme and updating the content. Then, start building links through guest posts or niche edits. Additionally, focus on review-based sites as well. For example, if you have a product page for a coffee maker, list it on websites featuring "Top 10 Coffee Makers" or "Best Coffee Maker Machines" to boost both your SEO and sales.
One more thing: utilize social media to promote your products by offering discounts, giveaways, and special offers to your followers.