Car vibrates at high speeds?

I just bought a used car today. It's a 2010 Hyundai Elantra touring. I bought it from a highly-rated local Hyundai dealer. It just passed a PA state inspection, plus the dealer's pre-owned inspection. They said the only reason they couldn't call it certified is because Hyundai will only certify used vehicles under 50k miles. The one I bought has 58k. It has some nice cooper tires on it, with at least half their tread left. It has a clean car fax, with only one owner and no reported accidents. It drove fine during the test drive on Wednesday, but after I picked it up today, I took it on the highway and noticed a lot of vibration above 65mph. I know there are a number of things that could cause vibrations like this, but what do you think are the most likely culprits? I'm calling the dealer on Monday to get it checked out, but I'm curious to see what some of you think.

2001 PT Cruiser hard to get into reverse and slipping out of 5th gear?

My 01 manual trans pt cruiser is really hard to get into reverse. I have to try like 4 or 5 times and finally there's a low clunk noise and it goes into gear. It also pops out of 5th gear and I have to physically hold the shifter in place. What could be the cause of this? I thought it was just a bad clutch but now I'm worried it may be a bad transmission.

MY GALAXY S4 WILL NOT CHARGE?!?

This is getting me beyond mad.. My phone only charges when it is turned off and I just let it charge for 2 hours and it only got to 20% .. That is not normal.. I have tried 3 different chargers and many different outlets to no avail. It cannot charge while it is on.. It says it is charging but the battery keeps going down.. Do i need a new battery? Has anyone ever had this problem? Please help.. This happened a few days ago out of nowhere and the battery drains really quick

Why do I manage to wreck every single car I buy?

I swore that the next car I own I was going to be so extra careful with it as to not put a dent unto it. Then guess what happens, I drove into a mcdonalds and sort of in a hurry. What happens is I guess I made 2 right turns too close, one right turn off the main drag and another right turn unto the mcdonalds parking lot and here is where I must have gone over the curb. I hurt a bang. I stopped and parked car scared to look but there were no dents. Now 2 days later I noticed that the passengers side hub cap is bent. Does not look like the rim is hopefully not, but the dang hub cap is.