I have two BLtouch probes that no longer worked because the probe had got bent or broken.

It is possible to buy just the probe and give the BL touch a new lease of life, the probe is held in place by a grub screw in the top.
If the probe is just bent it can be removed and carefully straightened, straightening in position can result in a broken and useless probe.

I got a new a new OEM probe on ebay for £3.99.