How to display grid/card style information (without any images) so it doesn’t look repetative?

My intent is to display data in a grid formation, presented as cards. I don't know what cardinal rule(s) of design / UX I'm breaking here but it is not working out how i would like it.

Here is a mockup/placeholder for what I'm trying to achieve (very roughly):

I cannot use any images to make it more visually appealing as the listing is for the same digital item but with different options. I want to represent these options with icons (empty circles in the mockup) to differentiate one card from another. Seller's shouldn't have a display picture shown either.

Is this fundamentally a Design/UX misstep or something deeper?