I want to upscale my PS2 and Xbox with an AV to HDMI Upscaler, do these work or are they a scam?

http://www.trademe.co.nz/electronics-photography/home-audio/home-theatre/auction-748547655.htmIt just seems to good to be true really.

I however, have no knowledge on this and would appreciate some help. DoA Beach Volleyball isn't getting justice on my LED.