How much can I sell my PS3 for? (With few games)?

Well i'm from the UK so my currency will be in £ (GBP), you can use Google to convert it to your currency.

Assuming you mean 120gb Slim PS3? 111gb will be how much space you have minus the space taken by the operating system, second hand they go for around £70-£80, lets go high and say £80.

The games will be around £50-£60, most of them are only going for around £5 due to their age, Advanced Warfare is going for around £10 as it isn't that old and Minecraft you won't be able to sell unless you don't want to format your PS3 which would be a security risk.

So, you'd be looking at £130-£140 for the lot, so you'd be half way to buying a PS4