In all honesty, go with a brand name manufacturer like Crucial, Corsair, G. Skill, Kingston, etc. I don't really truce that cheap crap. It'll probably die on you.
^ agreed. Cheaping out doesn't do you any favors. You generally spend more time and effort troubleshooting shoddy components, ultimately making the quality purchase the first time cost less.
Do you have existing memory in the motherboard already and just wanting to add more or do you need memory? If you have existing memory already, get the exact same stick if you can as it will be most compatible. If you need memory then get 2 sticks of 2gb so you can run dual channel. That ebay memory will ship from Hong Kong so will take a while to get to you.