Yeah, you have to keep checking the stores cause they will be sold out and then they get more in. I got mine at Walmart yesterday and the day before I was there they were all out of them. I almost didn't check and was going to get a V3 instead at Kmart. But I put the v3 back and went to Walmart and BOOM!! They had a whole bunch of them.. all v4! They are selling really quick, so you have to keep checking the stores alot.. every day if you can.