[dude3]

Been buying a lot of stuff on eBay. On the app, you can filter by Guaranteed Delivery 1 to 4 days. If it doesn't make it by the guaranteed date, you get a $5 credit to your eBay account. It's also frequently cheaper for new stuff. For example, water bottles and bluetooth adapters.

[Scoundreller]

And if you really want to save money and have patience, just sort by Price + Shipping: Lowest First.