I got $14,000 off sticker for my 2012 F350 SRW King Ranch CC LB 6.7. Any Superduty on the lot was advertised at that price on their web site. But it was end of model year (July 2012) and the sticker was well over $60K. Not likely you would get that much off the lower sticker. But nearly $9K off sounds like a pretty good deal. Try final dealing at the very end of the month.
Check
edmunds.com or
nada.com or
kbb.com or some others to get invoice price. Some of the sites give current rebates and incentives. You should be able to get it for around invoice minus any rebates. If the manufacturer is offering dealer incentives you might be able to wrangle part or all of that also.
When I was getting ready to trade and visited some dealers web sites to check inventory to find exactly what I wanted, they had a link to get a value for your trade in. I put mine in and it gave me a value of $22k. When I went to trade, the price of theirs was fixed at the advertised $14k off MSRP. But they only offered $16k for mine. I said their web site said it was worth $22k. They upped their offer to $18k. I said no thanks and started to get up. They upped their offer to $20k. I said no thanks and got up. Took them a while but they upped the offer to $21k. I considered starting to leave again but decided I was happy with that offer if they would sell me a 5th wheel hitch to fit the factory 5th wheel prep at their cost. They did.