One of the most important things is establishing trust indicators, because if a customer is dropping a lot of money, it better be 100% exactly what you promised it was. Over communicate all the key product points. You are going to want polished and professional imagery and videos. Think of 360 product shots, listing all product materials in excessive detail, reviews, customer lifestyle images and offering warranties.
Instagram is a great tool for building sales funnels with high end items. There is a niche community for everything. Find that community your product or service is a part of and jump in. You can consider doing a giveaway too that gets people excited.