Web Developer for E-commerce Maintenance

We are seeking a reliable web developer for ongoing monthly maintenance of our Minis Home e-commerce website. The site is already 99% complete, and we need someone to fix minor issues, update products, adjust the homepage, manage images and text, create discount codes, and perform general technical maintenance. This is a long-term retainer role for an existing site, not a redesign or development project. Workload will vary by month, with some months requiring very little effort. Please share relevant examples of past work, your proposed monthly retainer, and your rates for additional tasks outside the agreed scope.