How to boost your product sales If the product is for premium customers?

Look for customers who has potential of converting to premium ones, wither you are selling a product or a service; enlarge the targeted segment to include consumers who come right under your top priority, Converting consumers is a long and an ongoing proposes that require a lot of time and effort.

Another way to go about it is to offer a more affordable product to give a chance to regular customers to try it out, spreading awareness about your brand and product is critical to getting premium consumers, by building a reputation of quality and good user experience it will generate a buzz about your product and bring you more customers and convert a percentage of the ones who got the chance to try your less "Premium" product and want to give the real thing a shot.

Make it expensive and add a prestige to it .... make sure legacy customers get the benefit 

since you have already decided on the segment you want to target and already went through your differentiation stage,and know what value you are presenting to them,simply concentrate your advertising,marketing,  PR ,sales ,and after sales service at this segment and concentrate your focus on them.

target their work and living area's with every marketing tool you have, and don't forget forums and platforms they use and support.

just be wherever  they  are.

first of all you should be convinced of what you are selling then you should consider all your customers as premium customers and you should put this idea in their thoughts

try to expand your customers data base by looking for new targeted segments and work on that

thanks for your appreciable question