If you are wanting to play X and X-2, then it's no good getting a PS3. PS3s do not play PS2 games. However, you will be able to download VII, VIII and IX through the Playstation Store if you got one.

Here in the UK, PS2s are dirt cheap. You can find one second hand for about £30-£40.

Watch out for the prices on VII, VIII and IX. They can be very expensive. When I had to buy a new copy of VIII and IX, they came to £40 for the two, which is pretty cheap to today's prices. VII can be even more expensive, you just have to know where to look. eBay perhaps is the best place.

FFX and X-2 are cheap. I just found a copy of each for £5 all together.

You are perhaps looking at about £100+ for the lot (or whatever that is in dollars, wherever it is you live).

Hope I helped