Old concrete patio -renewal ideas

[Tomer Amir]

Hi guys

I need some help, I just bought a new SF and the backyard is all old concrete (49ft x 40ft)

I want to sell the house but I want to fix the backyard so I will be able to get top price for my house. 

So I thought about this options:

1. Put artificial turf

2. Paver it

3. Other idea???

What do you think is the best to do there with the lower cost? Any other idea? 

BTW taking the concrete out and make a nice garden is very expensive do that’s off the table.