Show products without sell them?

Hello.

I have a multisite network where people can create their own website.
Is it possible for my clients, only to show their products on their website without having to set up a payment gateway? Can Market Press used for this?

The reason is that I find it, with my knowledge of coding, very complex to set up, for example, chained payments in Paypal.

So I thought that my clients just could exhibit their products.

Best, Tim