Have you ever heard of SketchFab?
A lot of people use it inluding myself, so sketchfab is a great website to use not just as a market place but to show off your models to your clients.
I use it to send 3D Blender models to my clients so they can view and approve the models prior to editing images, doing this has been such a time saver as prior to this I was rendering images editing and sending to my clients only to be told days later they wanted something changed, below is an example of how you can embed a 3D model into your website.
Overall I would thoroughly recommend using Sketchfab whether it’s for selling your models or using so your client can view their models.
For more details please visit SKETCHFAB.