As a kijiji seller who states "available if ad is up" nothing is more annoying or makes me a "knuckle dragging dirt bag" than when I see the default kijiji message:
Hi, I'm interested! Please contact me if this is still available.
Because it takes 5 seconds to alter the message to something else.
Can I get this Saturday?
Do you have instructions?
Might you have Con 2 to go with this Con 1?
Accomplishes the same thing (inquiry) without appearing lazy or having a reading comprehension issue.