A few pointers:
1) you can try staples, costco ( I think they have some sort of warranty), walmart yeah “happiest” Best Buy is also a good place to go. There are also online sites, don’t know much about them
2) Be sure to check out consumer reports to see if what you want is rated well.
3) A warranty can come in handy, especially since many times there are problems with technology (sorry!).. some stores offer a free warranty.
Good Luck!