Selling files here: what makes a listing convert?

Photo of the finished physical item, not a render of the file. Buyers are trying to imagine the result, and a screenshot of vector paths tells them nothing.

After that, in rough order of impact:

1. State the material and thickness it's designed for, in the title or subtitle.
2. List every format included and be honest about it. "SVG, DXF, LBRN2" beats "multiple formats".
3. Include a settings sheet and say so. It's the single most mentioned thing in my reviews.
4. Say which machines you've actually tested it on.
5. Kerf note. "Kerf-compensated for 0.15mm" signals you know what you're doing.

And show it at two scales. A file that looks great at 300mm may be undeliverable at 80mm and buyers can't tell from one photo.

Bundles convert better than singles for me, even when the maths is similar. People like feeling they got a set.