Should I buy this desktop computer?

I'm really trying to find a good desktop pc is this a good one? Http://www.ebay.co.uk/itm/ULTRA-FAST-Quad-Core-8GB-1TB-Desktop-Gaming-PC-Computer-AMD-HD-/191025096255 can it run battlefield 4 and if so on what settings and on what fps also what fps for minecraft. Thanks, I really appreciate the help, but only with people who know what they are talking about please, and it want more than one opinion so please post, even if someone else has. This is just so I don't get mixed replys as I have done before.

Get a hacked account back?

Okay so I tried to log in to play minecraft and it said my account password is incorrect eventhough I've been using it for 4 years.

Which computer should I buy?

Http://www.preloved.co.uk/adverts/show/108323591/deluxe-new-41ghz-8gb-2tb-dvdrw-wi-fi-hdmi-w7.html or. Http://www.preloved.co.uk/adverts/show/110080728/low-cost-gaming-tower-reduced-for-quick-sale.html which one is better for gaming, i have been told the second one is good and I can play battlefield 4 on it? Of so on what settings and with what fps? I will make sure to pay once I know the computer is working, as to avoid any traps, thanks i really appreciate it. Also what fps will the second one play minecraft and the wolf among us on? With what settings? Anyone kind enough to answer everything will get a 5 star best answer, thanks.

What are your favorite quick online games?

By this, I mean something that doesn't require a bunch of time and something that you can just play as long as you plan for. This wouldn't be Minecraft, not that I don't like Minecraft or anything. I'll put one I'm currently playing out there: Cookie Clicker. It's pretty fun and you can quit any time. I've decided to be nice and put the link here:
http://orteil.dashnet.org/cookieclicker/
Go ahead and post your ideas below, maybe with some description.

A problem with keys on the keyboard sticking. Is there a cheap fix?

I have this problem when I play games on my console that the keys seem to lag behind when I'm pressing them, and sometimes if I tab out quickly to access skype for example and type, the problem will then persist and follow onto that, the screen then freezes and then when it reacts the keys start typing in, then works fine when I'm typing (for the record it is working fine now)

I was wondering if their is a fix, I suspect it might be the ram in my computer as I'm currently running 4gb on gaming Desktop (not the best I must admit, but Working the keys seem to be lagging even now(not really necessary but I thought I would say as I tabbed out to a skype chat) I'm wondering if there's a cheap fix, as I really am worried that I will need to buy a new keyboard which since my savings are currently going into the new Ram for my computer… I wouldn't like to spend much money on fixing a keyboard problem. The mouse works fine and after looking up solutions on the internet, I have found none that seem to work… I'll try and give a full example of the problem when it mostly happens.

It mostly happens when I'm playing the game Minecraft. It will work for about 10 minutes to an hour sometimes and when it stops working, the character will stop moving if I'm holding the walk button, or will stop rising if pressing the space bar. The mouse works fine, and then after pressing the buttons to try and move the character will stay still, 5 seconds - a minute latet (at the extreme) it moves as if i just lightly tapped it and begins to move on the keys that I have pressed. The game doesn't seem to lag, apart from it freezes slightly when it "bugs" out as i tested it with moving enemies (base ones that spawned) below a block. This problem also persists into other games like the game Magicka where I use the keys (qwer, asdf) and the mouse and as these are mostly the keys that are sticking or bugging, it makes play difficult or even impossible. Is there a fix?

Should I buy this? Is there a risk with second hand?

http://www.preloved.co.uk/adverts/show/110080728/low-cost-gaming-tower-reduced-for-quick-sale.html just to clarify, this comes with the charger and 4gb of ram is enough for gaming, could this handle battlefield? What fps would it get on minecraft aswell? Thanks I need an answer quick tough thanks a lot all help is appreciated no matter how significant.

Added (1). How well can it run battlefield? Fps on those settings?