honestly, i have had some pretty bad luck chasing those rock-bottom prices during these big sales. last year i thought i found the deal of a century on some random site... turned out to be a total gray market mess with no warranty. it was really disappointing and not as good as expected because i spent weeks fighting for a refund. heres my takeaway from that headache:

• i mostly look at the official refurbished store from the brand itself nowadays. the prices are usually just as good as the holiday hype but you actually get that safety net.
• local brick-and-mortar shops sometimes have way better bundles that they dont even list online because they want people in the store.
• tbh i often wait until january when people realize they didnt actually want the Nikon Z50 they bought and dump it on the used market for cheap. just my two cents... better to be safe than save fifty bucks and end up with a brick.

Wait Z50 Mark II released, than we may see big price drop on original Z50.

Just check Amazon, B&H Photo Video, Adorama for Best deals.