The Skerton apparently has a wee bit of play that develops due to the way that it's put together. The Mini Mill is a wee bit better for this even though it's smaller and cheaper. The Porlex is best out of the lot though (and fits perfectly inside an aeropress for travelling if you're into that kind of thing).
These are all based on opinions I've read/heard, though I'd say they were pretty reliable sources. Personally I have a 50s Zassenhaus grinder. Bought it for a penny on German eBay and paid €13 postage. New Zassenhauses are supposed to be a bit crap.
I've heard good things about the following:
Hario Mini Mill [link] [£28.85]
Hario Skerton [link] [£37.45]
Porlex Ceramic Burr Hand Grinder [link] [£39.95]
The Skerton apparently has a wee bit of play that develops due to the way that it's put together. The Mini Mill is a wee bit better for this even though it's smaller and cheaper. The Porlex is best out of the lot though (and fits perfectly inside an aeropress for travelling if you're into that kind of thing).
These are all based on opinions I've read/heard, though I'd say they were pretty reliable sources. Personally I have a 50s Zassenhaus grinder. Bought it for a penny on German eBay and paid €13 postage. New Zassenhauses are supposed to be a bit crap.
Hope this helps.