I contacted the guitar store where I traded in my Mooer before I bought the Helix to see if they still had it... and they did. And the guy emailing me back was the same guy who was helping me in the store (and the owner's son, which ends up being pretty handy for this story), wanting to know why I wanted it back after I'd just got the Helix. So I told him what happened. He emails back saying he's going to talk to his dad, the owner of the store about it. I get an email back about an hour later saying that I can come in today to pick up my old Mooer back for nothing and also that I'd be given some store credit for the next time I wanted to buy anything from them, and that they were sorry they couldn't give me a new Helix (lol, no shit they couldn't - but nice of them to suggest they would have if they could). Pretty great customer service, well pleased with that.
So I'm gonna pop around on my lunch break and pick that back up. It's not ideal, because what would be ideal is getting my Helix back... but it's nice that they wanted to help me out like that. Apparently there's been a hardware update since I last traded it in, so that's cool. I liked the high gain amp models on it, some of the effects aren't as good as on the Helix - but fuck it, it'll do for just fucking around. Going to have to go through some IRs to figure out which ones I liked.
There's some great free IR cabs out there (if you use that stuff @Mel81x @Happy Blue - I think the 6505 MH has USB/XLR outputs so you could put it straight into your computer/an interface and have your actual amp powering virtual cabinets). This video lists some good ones: