That does seem frustrating, a $3 fuse shouldn’t trigger an extra $15 shipping charge per item, and it’s likely just a system glitch, so I’d recommend contacting their support directly before ordering since most sellers will combine shipping if you ask politely. On a side note, if you’re ever shopping for accessories online, I recently came across a store that genuinely impressed me with its beautiful large crystal earrings, fair prices, transparent shipping, and no hidden fees, which is always refreshing. Hope you get the fuse issue sorted out easily!