At least Les Stroud, when he carries a knife other than the one with his multi-tool, carries a Buck 119. That's available at my local Wally World for $34. A week with him and his harmonica in the boonies might get old...
That Bayley knife did start my 'ultimate bushcraft knife' quest a year ago. I have since spent more, no doubt, than the Grylls knife - but I have a bucket full of candidates, one even has a horizontal sheath... okay, it's nylon. The Buck 005GYS - I reviewed it here earlier this year. It cost me ~$60 delivered here - probably what the s/h on the Bayley would run. I haven't tried serving termites on it - yet.
Yeah - an RC-4 with, or for me, without serrations - probably a better candidate. Now we need "The Frugal Survivalist".
Stainz