Fair enough, not the same as the OP but very good deal if your already a costco member (y)
The costco ones were tile mate for £29.99 for 4 with replaceable batteries I bought them. Sorry you find that hard to believe. I think this post is for tile pros which have a longer detection distance and also have replaceable batteries
Find that very hard to believe. This is still a cracking price for what you get have some heat
Not true costco were for the replaceable battery ones. I bought them I think it worked out at £30 for 4
The *old* Tile Mate had non-replaceable batteries - the latest versions do have these.