If you want to sell then, you need a real ad: photos, description and a price.
When you post up a real ad, you only have to write it out once, and you save a lot of questions about the basic details.
I know the theory about “but this way only genuinely interested people will contact me”, but it is nonsense: this way you are forcing every vaguely interested person to take up both your time and theirs - so it is entirely counterproductive.
(To be clear: I have some interest in the 244 and 850, subject to the usual variables that would be answered by a real ad)