Hi I am interested in your truck for sale.
That's great to know. I'd like to sell it for the listed price, but I am more than willing to negotiate.
I see that it has somewhat high miles.  And the tires are stock tires.  I'd like to make an offer of $5,000 cash.
Knocking down the price given those details is fair, but I don't want to go that low. Are you willing to do $6500? I'll even deliver the vehicle personally.
I'm on a budget and I do have some concerns regarding the transmission needing work.  I could go up to $5200 but that is the most I can do due to budget constraints.
Ok, that's understandable. I'll settle for $5200.