Looks like they are not profitable atm, but that's at Lbry's current low prices I might see if I can win them, I have a feeling LBC is going to boom.
Thank you for the links, that helped a lot.
Do not buy used ASICs.
The only thing I would buy is the old Bitmain AntMiner S9-S15 ASICs, which are very inexpensive to repair and are repaired in most services. But you must have very cheap electricity, for example 1.5-2 cents.
And if unpopular asics break down, you won’t be able to quickly repair it.