You have not included sales tax, which could be a significant amount, depending on where you live.
Example at 8.25%, 8.25% of $8,700 = $718. That is an additional amount that YOU would be obligated to pay, not the store to absorb. Because if you bought from an internet store in your state, YOU have to pay the sales tax.
If you want $8,700 out the door, you are sticking the shop with absorbing and paying the sales tax.
At which point, you are asking for a 20% discount.
If I were the owner of a small local camera shop, my answer would be NO.
If it were Best Buy, who knows?
I am not privy to the manufacturer/dealer contracts, but "I think" for some of the pro gear, dealers are not allowed to sell below the manufacturer's set price. In which case, they cannot give you any discount. They could discount other stuff, or throw in other stuff for free, but the gear has to be sold at what the manufacturer specified.