I think the Spruce price must have been a mistake, but I rechecked my order history, and it was in fact $128.95. The same part number is nearly double that now though.
I do like the idea of trying to clean it, and never thought to try it. Looking inside the one that went bad appeared completely clean, but of course you can't see everything.
RV-8, SN-80587, built, flown, sold.
RV-3B, SN-10751, rotary engine, built, flown, sold
RV-8, SN-82470, built, flown, sold.
RV-3B, SN-11351, purchased, , flown, sold
A&P - 2018