I have analyze your request/requirement so all you need is opencart website want add microdata like price,condition,price currency.
I’m an expert Search Engine Optimizer with more than 2 years experiences of both On-Page and Off -Page SEO.
I am very much interested in your project with all of your requirements.
Recently I have successfully completed a SEO project on A project name both on-page and Off- page SEO, Full white hat Complying with Google Panda and Penguin Updates.
Kindly reply me soon so we can discuss more about this.
Thank you