Quality, reputation, and discreet shipping/delivery.
Not so much interested for extremely fast ETA (though it certainly doesn't hurt!), I have patience to wait if there's a good reason.
Shipping and packing delivery professionally as discreet as possible is very important with international shipments. Usually shipments have to get cross many borders, and are handled by very large number people, so for the shipment to actually reach its destination it should be done with care.
What comes to price, I'm willing to pay for quality products and service, just like with everything else you get what you pay for. If I know that I'll get fairly priced gear from someone who has reputation for standing behind quality of his products, taking good care of customers, and shipping with extreme discretion, I'm happy to pay higher price for all that combined.
Higher prices have to be justified, but if that happens and promises are delivered, I will keep using the same service until some kind of problem arises.
Sent from my GT-I9300 using Tapatalk 4