Doesn't really matter (as long as you're buying direct from Amazon, not a 3rd party even if fulfilled by Amazon).
Also, nice with amazon.com, if you sign up for their store card, you can charge and with an amount like this, pay it off 12 mos interest free.
I like that!!
On the other hand, I bought my 5D3 from crutchfield, they too had a credit card for interest free payments (was nasty interest after that deal tho, so dropped it after paying off)....BUT one nice thing from that is Crutchfields rewards points system.
I got enough points off my initial purchase of the 5D3 and 85MM 1.8 lens, to where when the Canon lens rebates were on, I got a brand new 70-200MM USM L IS II for about $1400 total.
Those rewards points can really add up on a large purchase, I even earned more points off that last lens purchase and will use those towards another lens when I get ready again, likely the 5OL.
Give them a look.