Dont take this the wrong one, but your website is losing you a lot of money. My generation (90s+) usually finds that a well designed website with easy navigation is always a winner for shopping. Your website reminders me of something I seen back when I was 8 and the internet was taking shape.
Having a feedback area for registered users is always a good one. This way people can always read up on what others things. Keep doing what your doing and the feedback should be great.
So please! Invest 500-600$ and get a better website. It will help you out a lot.