Here’s an update for this topic: we’ve implemented the online shop here on EnviroDIY to sell 5-packs of various products, including the vertical microSD card adapter board. All prices include shipping (to US addresses only). Restocking items on Amazon has been extremely slow lately, so if anyone wants to buy Mayfly boards, kits, or accessories in multiples of 5, please use our EnviroDIY shop instead of Amazon. You’ll also save 10% that way too. We will continue to sell on Amazon as well, but this shop allows us to fulfill bulk orders quicker and without emptying our Amazon inventory as frequently.