Here is a short list of items that are usually negotiated on between a buyer and seller.
1. Discount Points
2. Loan Origination Fees
3. Other Closing Cost
4. Amount of Earnest $
5. Seller Financing Terms
6. Purchase Price
1. Closing Date
2. Date of Occupancy
3. Conditions & Contigencies
4. Required Inspections
5. Warranties & Protection Plans
Negotiating is a back and forth process. So if you "give" on one item you should try to "get" on another.