So, we want our driveway extending (currently half is block paved and half is garden). We've had 4 quotes, 2 from well known, local, reputable companies. Both were very expensive, between 5-8k, just to gravel half of it, both had different ideas on how best to go about it too in terms of us needing a retaining wall. Third quote from unknown company they wanted 6k for the whole lot plus more if we needed a wall.
They also can't start any work until next Spring! But they've got loads of good reviews on check a trade etc.
We've had a really cheap quote of just over 3k and that's to re block pave the whole lot, but, he was on about reusing the old bricks and mix them in with the new ones. He could also start next week, though apparently was booked up until Xmas after that) hmm 
However he's actually done a drive a few doors up, that's were I found their details and it looks fine, though I guess only time will tell.
He's got a proper website with loads of photos of his work, but I can't find any reviews, or any info at all pre 2016.
Would you take a chance? Seems a bit too good to be true.