Bro, selling 101.
If you were buying a car, you would expect it to have suspension, tires, et cetra.
Quality of the parts, may or may not, have an effect on the price. But it is still expected to be there. Someone shows up for a test ride.
Mmmmmm....you'll have to bring a tire?
Just throw on something and let the buyer decide. Every buyer is different. Just need one. Ultra sports may be high grade to one, while a 23c tire may be a new experience all together.
Caveat---unless we're talking about something high end. Then, no tire sale may be possible. But still, as a buyer, it would be nice to have a quick run around the block.