It seems like the days of scalping a L3+ for huge profits sort of hit a brick wall

It makes sense though, Bitmain cranked them out like fidget spinners and now the daily return on one of these isn't that great.
To be fair though OP, they're still going for around your asking price on e-bay. I'd try to knock it out before the next 10 batches are released and buyers start doing the math...