Here to report a similar poor experience. Sent in my 2017 MacBook Pro i5 2.3GHz 13" (Mid 2017) 128GB SSD with a promised trade in value of $340.
I received a revised estimate of $0.00 after they received it due to "missing TouchID'.
This model does not even HAVE TouchID! Also, it's not like an accessory I didn't include, how might one remove the touchID? A cursory check of Apple's own technical details of the model (
https://support.apple.com/kb/SP754?locale=en_US) confirms no touchID with this computer.
Anyway, called Apple right away and have been promised a return email by tomorrow. I'm expecting that I'll have to continue to fight. It's ridiculous.