Some users have recently had their accounts hijacked. It seems that the now defunct EVGA forums might have compromised your password there and seems many are using the same PW here. We would suggest you UPDATE YOUR PASSWORD and TURN ON 2FA for your account here to further secure it. None of the compromised accounts had 2FA turned on.
Once you have enabled 2FA, your account will be updated soon to show a badge, letting other members know that you use 2FA to protect your account. This should be beneficial for everyone that uses FSFT.
If you're going to buy on eBay than you definitely want to buy from a vendor that offers warranty. Don't get stuck buying a boat anchor that you have to hundreds to return. Check on the return policy, check on the type of batteries and make sure you're buying what's described.
I've bought...
You need to get yourself a Smart-UPS 1400 or a Smart-UPS 1500. They're pretty much the best units on the market. They're also the biggest units you can put on a regular outlet, anything bigger than this you'll need to wire in a dedicated 20 or 30a plug.
If you want serious protection, stay...