Go fo Samsung galaxy a51
I love the Samsung galaxy a71. I don't know why but I find it's more convenient to use. Well, I'm not saying that any other phone is bad because many of my friends have different once and they are very satisfied but I wouldn't change it for anything in the world. Anyway, it depends on you how do you feel it and whatever makes you happy actually. My wife, for example, thinks that the android is for children and always makes fun of me and my phone, even more, she bought me an iPhone for my birthday, and what do you think? It stays in the box since then, lol.
For more detail click Best deals on Samsung on the market
There are several options from where you can purchase smartphones according to your budget and desire. I am going to list a few of them here:
Best Buy: If you are willing to go with exciting Black Friday discount deals on the purchase of smartphones, then no doubt, Best Buy is a good option. Browse their site, and you would find several options there.
Allo Allo: As a lover of iPhone, I usually prefer Allo Allo to get exciting iPhone deals. Especially, I love their refurbished iPhone offers like these which are worthy if you are having less budget. Yes, they are known of the provision of quality refurbished iPhones to their customers. So, if you are looking for refurbished iPhones then Allo Allo should be your preference.
Amazon & eBay: In the same token, online retailers of smartphones at Amazon and eBay could also be a nice choice to make a smartphone purchase. However, you should see the reviews of previous buyers to make the right decision.
Apple Store: The official website of Apple could also be a perfect choice if you want a brand-new iPhone. No doubt, Apple also offers trade-in option for iPhone users where you can get some off on the purchase. But, yes, you would have to give your used iPhone to the company.
Hopefully, you would make the right decision either it is about iPhones, Samsung or any other brands' smartphones. Best of luck!