I am glad it helped. I wanted to try to help others as I was wondering about the differences (of course I know they can fluctuate based on different items/different days/weeks/months, etc).
Mygemma tried calling me twice (missed them and then I called back and got their VM so it was a little frustrating) before they just finally emailed me the quote. I wish they would just do the site or an email from the get go as it is more convenient, especially when there is a time difference.
I also would rather take a lower offer with a site directly purchasing it from me than deal with potential scammer buyers (like selling on eBay, etc and chancing some buyer pulling some crap. I sold something on a site and the buyer tried to say the new LV item had a bunch of marks on it but I took a video of myself wrapping it so it showed what it looked like. I still had to deal with the stupid site as they tried to take the buyer's side despite my providing pictures/video showing the item was new/never used and had no marks on it. I reported that site to the BBB for keeping my money and letting the buyer keep the item that they marked up/wanted to return to me. I stopped selling on there and eBay after that). Now I only sell on FB groups (but am picky) or sites like
Fashionphile.