Can I get a mouse for my apple computer?

Yes

Yes you can.

Good for buying electrical effects

Best buy has everything you need for electrical devices for good prices i always shop their computers, mouse to pc

You may need to order it from Best Buy online. Many physical stores have very few computer accessories available for purchase nowadays. I recently went to Best Buy to buy a pair of headphones for my phone and the selection of available headphones was only 5 different types.

Yes . That is the best tech store to buy .