I have quite a few but I still don't have a true Meffert's: when mefferts.com announced that megaminxes were available again last year I ordered one (for $28USD) but I was supplied with a MF8 minx!!! Very disappointing as I was expecting a genuine (and now seemingly legendary

) Meffert's Minx.
However this MF8 is real quick and my preferred minx for speed. It pops like mad though and I guess that this is the first edition.
I recently got a black QJ megaminx from popbuying (
SKU 24166 $8.04) which is just a cheap PVC minx with pretty good tiles. This is a fine puzzle after sanding all the sharp internal edges that would cause the lockups (as per
Stefan's description) and of course adjusting the spring tension and lubricating.
Most of my other minxes are PVC minxes - they are all cast from the same mold but vary in how nicely finished they are, e.g. my puzl.co.uk minx was nicest PVC out-of-the-box with less sharp edges, good quality lexan tiles (well placed, good colours), suitably lubed, no need for screw adjustment, etc. Some other PVC minxes have been thrown together with little quality control, cheap and badly placed stickers, random tensions, etc. You have to spend some time working on them to have a satisfactory puzzle but like most cubers I don't mind dedicating a few hours when results count.