Pretty incredible prices, imo.
I haven’t worked with that sort of thing for quite a few years, but we used to recover quite a lot of silver. Real large lab for a studio chain; we used to ship somewhere around 300 lb of electrolytic flake every month.
You probably already know this, but the steel/iron wool cartridges can be something of a crap shoot with regard to your returns. You never know for sure what you're gonna get out of em. You pretty much gotta just trust your refiner. So that's a big advantage to having an electrolytic system (assuming one understands what's going on, and how to operate it). With electrolytic flake you let it drain for a bit before knocking it off the cathode(s) then weigh it. Then you know, with pretty good certainty, what is there.
Best luck on your return.
