That is sick. The pc board alone si worth more than that.The XFMR alone ~$20... Unless you already have one. Here is a good W/O XFMR adjustable dual PSU kit for under $7 w/ free shipping. Lusya DIY Kits LM317t LM337t linear Regulated DC Power Supply Adjustable Filtering board 5 40V DC F7 007|Amplifier| - AliExpress
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