I sent in four phones for an estimated fair price. (I thought it would be easier than selling on eBay but now I know better) 3/4 phones they checked in with wrong information and tried to weasel down my estimated price.
I made 3-4 calls to them to try and fix everything. I believe they just assume you are desperate for money if you are selling them a phone and won't go through the hassle of arguing with them if Gazelle checks them in as completely different items and lowers your estimated price.
Being in this business Gazelle should completely know that the Google Pixel phone is not on an AT&T plan, Verizon has an exclusive contract for the phones or the phones are unlocked. So trying to swindle me out of $$ for each Pixel I sent in by saying they are AT&T phones was a general annoyance.
And checking in a Samsung Galaxy S7 as a Galaxy Active is just silly, they are two very different phones.
When I questioned the mistakes they told me "human error". The whole ordeal took over 3 weeks to fix but it did finally get fixed.
If you have time to keep calling them and questioning them, then by all means send in your items but I am personally done with Gazelle.