hello
Hello. I am very interested in the chairs. I can pay cash and pick them up for $150.00
I can't sell them for half the asking price, sorry.  The price is firm
300.00 seems a bit much, especially if I am picking them up and have cash on hand....
Delivery would be $50 extra.  Paying cash does not offer a discount
yes, but I am not asking for delivery. Cash will save you money in credit card transaction fees. Let's do 200 and I can come pick them up right now
Transactions fees would be less than $5.  I will not go lower than $275.  That is lower than the normal price they sell for every day.  $275 is my final offer.
unless you have stellar credit card processor, your fees will be closer to 15.00 for 275. 250, cash on hand, I pick up, and will come get them right now.
$275 is the lowest price.  I cannot get them discounted from my supplier.  Any less, and it is not worth the sale.
We are talking 25.00 here. I like the chairs, but I am not going over 250.00. 
I guess we cannot make a deal then.  You will have to reject my offer.
okay, then. good luck!