My old X3 recently died after a few good years of use and i was on the lookout for a replacement.
Was considering replacing it with a Oclean X Pro however i came across this deal. If you can stomach the slow delivery time the price seems reasonable.
If you are not fussy about the colour of replacement heads and don't mind a non-original. The pink one is available for $5.38 AUD here https://www.banggood.com/2PCs-Replacement-Toothbrush-Heads-C…
This is a pretty good price, would get it but I already have the Oclean X Pro Elite on order. Have used Soocas shavers like the S3 and S5 before, so have no qualms with this brand.