Floating concealed shelf feedback

Requesting feedback. I’m a trying to work on improving my woodworking by finding things to build and sell. My latest attempt is making concealed floating shelving that you can lock with an RFID lock. I’ve found cheaper materials to reduce costs but I’m having trouble finding any interest via marketplace.

What would you feel someone would comfortable purchasing something similar? I’ve made a few changes to the one photographed such as the material, new ones will be oak top and trim and cabinet grade 3/4 plywood box.

Currently asking $120 but thinking I need to aim for lower. The only place I’ve listed is marketplace due to not wanting to make. Huge profit. Just want enough to keep the hobby going.