Search Google for words "3d printer deals reddit " and you can find a reddit thread where 3d printer deals are regularly posted. CRTouch comes up for sale on Amazon monthly. I've found deals for the BLTouch clones for as little as 16.
I have clones and CRTouch installed on different Ender 3s and all perform the same. The one caveat is you will have to convert one end of cable from Dupont to 5'wire JST connectors for a firm hold on main board. Also confirm the wiring colors are in correct order. After that, just update the firmware if required to make the BLTouch function.
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I have clones and CRTouch installed on different Ender 3s and all perform the same. The one caveat is you will have to convert one end of cable from Dupont to 5'wire JST connectors for a firm hold on main board. Also confirm the wiring colors are in correct order. After that, just update the firmware if required to make the BLTouch function.