Therapydude--FWIW, since both second and third generation Glock mags are FML, the vendor was okay in this respect. If it helps, I, too, have received a second generation G19 mag when ordering some FML pre-bans. Since it was as advertised (FML), I kept it.
I've never heard of an actual problem with second generation mags, but Glock didn't make them for long. I'd also be interested to know why the change to third generation.
Unlike the case with SIG mags, I'm not sure to what extent Glock mags come in an "original" package. I can say that of the dozens of Glock mags I've purchased, not a single one was in any kind of factory packaging--and this includes brand-new post-bans. Some had no packaging at all. Others were in a bag supplied by the vendor. Some mags had a label which at first I took to be a factory label. But I later learned that the label was in fact applied by a certain wholesaler. All this is just my experience--the experience of others may differ.
A Glock mag that's been significantly used should show scuff marks and maybe some deformation around the slot for the mag release.
If any problem arises with the 9mm1 follower, I suggest shipping the mag to Glock in Smyrna with a note, and they will upgrade it at no charge. Alternatively, a 9mm3 follower can be purchased separately from the Glockmeister.
IMHO the only thing really troubling about your transaction is the price. I'd say the vendor made every effort to maximize his profit, IOW engaged in a legal rip-off. My best sources for pre-bans are Glockmeister, R Guns, and CDNN. Of course, it's possible for transactions to go wrong with any outfit, including these three, but on the whole they're fine. OTOH, one or two of them certainly take a rosier view of some of their products than I do, so of course the buyer still needs to beware.
HTH.
[This message has been edited by jimmy (edited September 14, 2000).]