Delivery is often the fly in the ointment, when purchasing. So I do buy a lot in terms of online stuff through Shopee and a couple of other vendors. I also use PCHome and OfficePro for deliveries.
I kinda see the delivery cost as my time/transport costs SAVED. I just have to get to the local store across the road.
Otherwise I’d have to go to the store in Sanzhi (I’ve done it… it’s not near! Took me thirty minutes one way and gasoline for 40km so actually, it cost 1 hour of my time PLUS 10km typical gas usage… so $120.
Going uptown is not really different. It takes time & MRT fares (so at least $30 per trip or $60) or gasoline. (typically about $65) to Tianmu.