I've noticed a problem with purchases across multiple vendors (so it's not an issue with failed delivery from one vendor). It seems to affect the magic boxes but not Merchant Outbox Direct Delivery items. If I am not logged in at the time of purchase, there's about a 40% chance the item will not be delivered. If the merchant attempts a re-delivery, I'll only receive it if I am logged in at the time. One merchant that I frequently purchase items from is really good about getting back to me quickly, but sometimes I'm not logged in and don't receive the items. Other merchants (likely not logging into SL frequently) don't even redeliver unless I send multiple requests (an ongoing problem with marketplace, but understandable). I Feel bad for the merchants that are getting nagged abotu the issue, but this is getting really frustrating. Full perm mesh items are expensive, some vendors don't have in-world stores, and I'm continually having problems receiving the items I've ordered.