Well, for the price, the whole package, it's pretty good. It's true that you would have to buy memory (their thing is a pack of three to take advantage of triple channel), but... for 200€ +/- you have a great upgrade for your computer. I recently got myself an i7 950 (110€) and I'm reusing the i7 920 in another motherboard that I had for the family PC. You really don't think that for everyday use (games, multimedia, office work) you're going to notice differences with a newer core i. In consumption, OC and pure performance (in a rendering and more work tasks with professional programs) there is more difference, that's clear and... the usual thing that with second-hand you always have fear if you get a lemon. However, if you feel more comfortable you can invest in something new, only that you will pay for it. You can easily go to around 260-300€, depending on what you buy, of course (speaking of new, maybe with second-hand you'll see something cheaper). Well, I think a 2500k second-hand would be very tempting, and they perform excellently. But as I said, it's a matter of seeing offers and analyzing it coldly according to needs.