By my counts it would be cheaper for me to get the S323 together with a vial from Merkava, due to combined shipping, despite no discount and the addition of a handling fee. Might not be true for others depending on what your shipping cost is here. For me it's $6.78 shipping to Sweden and it ends up costing a dollar or two more:
Merkava fob+vial: $37 + $5 + 4% + $0.30 = $43.98
Massdrop fob + Merkava vial: $18.99 + $6.78 + ($14 + $5 + %4 + $0.30) = $45.83
Not a big difference, but also more convenient if you have to order from Merkava anyway. If your shipping on Massdrop is cheaper than mine or if you're getting vials from somewhere else, this might still be a deal for you.
Merkava fob+vial: $37 + $5 + 4% + $0.30 = $43.98 Massdrop fob + Merkava vial: $18.99 + $6.78 + ($14 + $5 + %4 + $0.30) = $45.83
Not a big difference, but also more convenient if you have to order from Merkava anyway. If your shipping on Massdrop is cheaper than mine or if you're getting vials from somewhere else, this might still be a deal for you.