Why did the price change so much?

I wanna upgrade my phone to an iphone and I looked on the verizon website yesterday and saw that it was $100 but today I look and I see that it changed to $200. Why did the price change so much in one day? Also, is it cheaper to buy it in stores or online?

It was probably a promotion special that they were running on their website to get more customers. Online is only good for the refurbished or special offers and does have everything while the stores does have limited stock

  • Why did my iphones carrier change? I'm with telstra, and now my phone says carrier as optus. My phone is locked to telstra but i thought it wasn't and ordered a tpg sim which i put in it. I can't call anyone but my carrier changed?
  • Why did my iPhone ask me to change my password within 24 minutes? I was just watching YouTube and this little thing pop up on the screen said change your password within 24 minutes so I got scared as sh*t cause my phone is my life so I changed my password and then it just went away but I got the iPhone 5s and I'm just scared sh*tless right now as to what the f*ck just happened to my phone someone please explain
  • Why did Apple always put the price of their products very high? I know they produced amazing gadgets but why they have to be so expensive? But still, many people still wanted to buy their products. Even I also love Apple and using iPhone 5 right now, but it was like addiction. Why?
  • What is a good price for aniPhone 4s price? The iPhone 5 just came out and I my friend wants to sell me his 4s because he got the 5 but he's asking $200 Is this a good price? By the way it's a 16 gb.