Trying to sign up and the following page is not found
https://bidslammer.com/auth/ebay_redirect/

Hello Simon,
Thank you for reporting this error with signup. This explains a lot, actually. The corrected link is:
https://bidslammer.com/user/authorize/ebay_redirect/
Let me know after you sign up and we'll give you 3 free months of premium to say thank you for the report.