Need a website for selling old medical equipments for firm with phython language and should be friendly with smatphone also.

I am looking for a web developer to help me create a website to help me sell my old medical equipment. I have a budget of less than $500 and need the website to have a search bar for users to easily find my products, an online store with a shopping cart, user registration and login, and should be friendly with smartphone. I have some ideas on design and layout, but am open to any suggestions from potential developers.