It is very annoying. I always respond because you never know which are legitimate. I’d say about 1 in 6 produce a real sale, so to me it is worth it.

When you're on Marketplace on a smartphone, that message is pre-filled in the "Send seller a message" field and there's a "Send" button there as well. It would be easy for someone to hit that button inadvertently when scrolling through an ad. I attribute many of those to that simple mistake.

Exactly , i have send alot of is this still available, just because my big finger hit it , i have to apologize alot but most are ok with it.

Beings that is the only thing you can ask first time contacting thats why I ask. What I really want to know is How much or how many miles or does it run. That sort of things.
just

A lot of sellers state,"Will not respond to is this available."

I hit it on accident all the time when looking at something on Facebook on my phone, it automatically sends it!
I have asked is this still available to at least least 100 people in the last year don’t know how it does it, but for some reason when you’re scrolling, it sends it to them

When you're on Marketplace on a smartphone, that message is pre-filled in the "Send seller a message" field and there's a "Send" button there as well. It would be easy for someone to hit that button inadvertently when scrolling through an ad. I attribute many of those to that simple mistake.