Con-men using the name "GENUINE SIMULATIONS" are offering an FSX A380 for sale, they are entirely fraudulent, please do not fall for their scam! The screenshots shown on their website are stolen from Next Level Simulation's (NLS), of their unreleased A380. The feature list is stolen from PMDG and Aerosoft.

Furthermore, they are now using Just Flight's name without permission or any connection. Their "paypal" pages are also faked on their server rather than redirecting to PayPal secure servers, do not risk your PayPal/card details with them.

Genuine Simulations have been shutdown a few times already but they keep popping back up on different servers.

Sadly I must post another fraud warning:
FLIGHTREAL 32bit to 64bit Converter for FSX is a SCAM!

Avsim, Kosta and Majestic have already issued similar warnings regarding this "product"; there is no such thing as a 32 to 64 bit converter but Flightreal are selling this scam for approximately $12. From what I've read, all it does is turn your settings down, to give you the impression it's working.

If you want to improve FSX performance, I recommend FSPS Fiber Accelerator as one of the few addons that has been proven to improve FSX performance and stability. There's a free demo of Fiber Accelerator, limited to 5 uses, so you can see if it makes any difference before you buy it.