Is there any old ASIc miner either for BTC, Litecoin or other that's still profitable today? The ones I saw are only good for those that have free electricity, I'm asking on behalf of a friend who seems to have interest in ASICS over GPUs, believe me I've tried talking him out of ASICS.
The L3+ makes money.
It is the best old asic to buy.
on ebay for 600 to 650. buy it now.
decent sellers.
they use about 800 watts.
I still run 11 of them. along with the L7
800 watts is 20 kwatts. or
4 dollars power at 20 cents a kwatt
3 dollars power at 15 cents a kwatt
2 dollars power at 10 cents a kwatt
it will earn 90 cents in ltc and 3.60 in doge or 4.50 a day.
so if you have 15 cent power you clear 1.50 a day or 600 in 400 days which would be close to break even
if you have 10 cent power you clear 2.50 a day or 600 in 240 days
fairly quiet .