If you don't have sensitive eyes and no dark circle problem you can try Olive oil or Bio Oil as eye moisturizer and do some light eye massage everyday when you can.
I used to buy expensive products for eyecare but now not anymore, not because I couldn't afford it but because I found out that I don't really need any expensive product just for eye treatment. All I need is too keep my eye/face from direct sunlight by wearing SPF (at least 30 spf) sunscreen everyday and wear sunglass when I go out on a daylight.
Right now I'm only using Bio Oil as my eye/face treatment, sometimes Olive oil when I forgot. I just couldn't stand the dry feeling anymore so anything with oil is good for me.
If you're still young try the simples/inexpensive way first.