Is your feature request related to a problem? Please describe.
The tooltip displays a vendor price for legendary items that cannot be sold to any vendor.

Describe the solution you'd like
Do not display a vendor price for legendary items.

Describe alternatives you've considered
Display "Cannot be sold to a vendor" or something to that effect, possibly in red.

Additional context
I experienced this issue with Legion legendary items. I purchased one trusting that I could sell it to a vendor for 49 gold, as in the tooltip, but then realized the information was not reliable.

I've put a fix in alpha 557, available here or on curseforge

Can I have a screenshot of the item?

...sure!

...great! I no longer see the vendor price for that item. Maybe you'd be interested to know that before to open this issue I found two forum threads that described the same issue (I could post the links).