I believe it usually pulls from the mixtures and packets section with maybe the occasional selection from the worldwide category. I don't think I've seen a review of a dealer's approval teaser. There has been the occasional less-than-glowing review, but nothing scathing that I can remember. I've ordered hundreds of packets from dozens of sellers advertising in the classifieds and I'd say my experience matches Rawolik's - i.e. I'm rarely disappointed. I think the best deals to be had on stamp packets is through the Linn's classifieds - certainly better than my experience buying mixes on
ebay.