[switchers]

The camelcamelcamel site is always my go to for "is this actually a deal" on Amazon. There's also an extension called keepa that will draw the graph on the Amazon website for you.

[duxup]

You can also make a list on Amazon, then share that list with camelcamelcamel and set your prices and get an email and in the email see if it is a good deal or not. Very handy.

[coryfklein]

I'd heard that Amazon is getting around price trackers like this using the coupons.

1. List item for $100 with a $20 off coupon

2. On Prime Day, drop the price to $80 and remove the coupon

When you look at said item in CamelCamelCamel, I'm pretty sure it shows the price dropping from $100 -> $80.

[nickthegreek]

terramaster d8 hybrid shows as ~$299 on camel before prime day. but it had a $45 off coupon for at least a month that never got tracked.