Obviously sell those with low/cheap price is most safe/rational option. Waiting scrypt-based PoW altcoin's price to rise isn't good idea since other people would mine those altcoin which make difficulty rise quickly and all potential profit gone.
If you're into gambling/high risk choice and think scrypt-based PoW altcoin's price
will rise, then you should start mining with those L3+ ASICs and sell when the price rise. I don't recommend this though.
Considering winter is right around the corner, I would place these units strategically in corners of each room. Turn them on when it gets chilly. You can probably set them on a timer too so that your house is nice and cosy when you get back from work.
Also, if you have a newborn at home, they make a very enjoyable background sound that will soothe him/her to sleep.
That depends on OP's geographic, some parts of Asia and Africa don't have 4 seasonss.
Besides AFAIK most ASIC create noise and most people don't like noise sound which would disturb people if they sleep nearby it.