The new L7 Scrypt miners from Bitmain appear to be back in stock after being sold out since November of 2021. On the official website the sold out banner is no longer there and these miners can be purchased. The price has significantly increased to $18,500 since coming out originally at $12,000. Shop here: https://www.bitmain.com/ then select Antminer, then L7.
The estimated ROI for the L7 (assuming no appreciation in litecoin or doge price) is a little over a year using this calculator.
The miner currently generates around $43 in profit after paying the energy bill assuming a $.07 kWh rate. Of course the utility cost per kWh and kW depends are your utility.