I’m not sure if I’d be miffed or not. How would you have paid for the shipping upgrade? It would require a second transaction, since you’d already and bought and paid for the item with standard shipping.
You should have purchased from a Seller that offered this, & paid the fee.
Amazon takes a hefty cut of sales fees, you know, & small sellers just can’t afford this stuff.
I know. I’m a 5 Star, 100% Rated Seller. I often ship sooner than Amazon does. I bend over backwards, shipping from the Post Office Sorting Center near Nashville International. This clips a day or two off shipping times, & is not too far from where I work.
But shipping costs, & a very low priced item, sent by 1st Class, could wipe out my profit on many items.
I don’t think it is reasonable to be miffed that they wouldn’t provide a service that they didn’t advertise. Bosda could probably give you more detail on being an amazon reseller, but maybe it would cost them more time and money than you are aware of. Is there no way to find out if they can ship 1st Class before you buy? I thought the shipping terms were clearly stated on the website?