Programs well advertised always seem to build certain misconceptions. First the price of your home will determine what refund you will receive. Do not relie on Realtors to know every program available in the area you are looking to buy in. Research your local and county governments for offers they may offer, then State offers, then Federal offers, Remember they will always advertise the best possible return, makes them look better! As for $8,000 refund, that would be the max, the price of the home will determine the refund amount! Not sure if you got the full skinny from local and county officials, then also ask a local CPA firm to see what refunds they have found for local buyers!
Louise gave a great answer. Just to build on what She already stated, here is a link to the FAQ's about the new $8,000 tax credit.
Hope this helps. Please feel free to contact me with any more questions or concerns.
Happy House Hunting!
Coldwell Banker Residential Real Estate