Will have to be very cheap, pretty old now. I had one before getting a higher range one and it was a good reliable small radar, as long as you think its cheap, get it.
It was made by Raythion and just the same as their own brand. But rebadged to get rid of over production at a lower price without affecting there own brand.
It was very good at the time, I had one. But as Colin says, it must be getting on a bit now.