Hello are you interested in this item?
Hello there,  yes I am, can you tell me about it?
Its a great mattress for a queen bed. its an x-firm mattress, box spring and has a frame. I got it but don't need it to use anymore. So trying to get rid of it. I am selling it for $275 as listed 
Are those stains and dirt in the photo or is that just the pattern?
No its all pattern. I haven't really used it. Its as new. 
Ok. Was it used with a mattress cover?
Yes it was 
Ok that all sounds pretty good. Since it's still a used mattress and not a new one I was hoping you could go a bit lower on the price though. 
I can give it to you for $250
Hmmm my budget for a mattress is not really that high to begin with and it is a used mattress. I was hoping to pay about $135
Woah that's too too low. I am sorry I can't go that low. The last I can do it $200
Well like I said it is a used mattress and I am taking quite a risk that it doesn't already have bed bugs or some other issue. 
Well there is no such issue. I can give you the cover as well with it if you're interested. 
Well if the mattress is already used I would definitely at least have to buy a new cover. If the mattress is contaminated then the cover that was being used on it would be too. If I come and pick it up right away and pay in cash could you do $150?