set up alert

Yes you can set a 'keyword alert'

jco8326/06/2019 23:01

Yes you can set a 'keyword alert'

I can't find this either, how to you set up a keyword alert ?

Bit late as far as responses are concerned but as they say, better late blah blah blah
From the help section:
To receive an alert for each new deal corresponding to a product you are looking for, simply go to your profile settings on the "My Alerts" tab. Enter a keyword (for example "PlayStation" or "PS4") and adjust the notifications you want to receive for that particular keyword. You’ll need to be logged into your account to create multiple alerts and to manage them.

Actually, that's not as clear as it could be.
Click on your profile picture to the left of the +Submit
Click on Alerts on the dropdown
Click on Manage Alerts
Enter the keywords for instance Kettle or less broadly the make or model though as this relies on the poster actually putting that detail in the post.