I have a cheap one branded 'silverline', model # 220841, bought it c.£15 from a hardware store* that had a section of fireplace/log accessories. Works OK, I doubt it is accurate in any scientific sense but good enough to see if a log is OK enough for turning or logpile sampling for burning. It goes to 'max' at 40% if I stick it in fresh spring cut tree branch, some stuff that's been on my garage floor for a few months is coming up at 12-15%, some older purchased blanks are around 8%. It has a separate range button for masonry but I've never used it. I was going to moisture check parts of my wife but she objected. Battery life fine, it auto-offs a bit too quickly sometimes. Takes a few LR44 button cells out of one of those cheapo pound-shop-style mixed packs. I'm sure there are many similar others. I think of it as a relativity indicator not a precision instrument.
* when I am on holiday in small towns I do like to give some business to local hardware stores - wonderful places that we should support. The number if times you see the shop assistant patiently helping someone find the right lightbulb or put a new battery in their torch. A social service for some perhaps.
