Did Phobio actually deliver the price they offered for a trade in for you?

Has anyone ever gotten the promised value from a trade-in with Phobio, Apple's trade-in partner? I've sent them products three times. All three times, the trade-in value was slashed once they had my stuff in their possession. The first time, I let it go, because there actually was a ding on the case. Legit. But just now they've written me back about the last two things I sent in and their claims and photos are nonsense.

This is feeling like a scam. 3 out of 3 times, they've made one offer and then slashed it to a third of the original offer once they'd made me wait. Looking over other threads here, I'm seeing plenty of complaints about similar behavior from Phobio and a lack of people saying anything to the effect of "worked for me!"

I'd love it if folks would chime in and just say how their experiences with Apple/Phobio trade-ins went, good or bad.