Hello Ged,

It looks like a Manitou but I'm no expert. The Titan Mohawk single stroke side lever one I have is very similar and was based on Manitou parts althought the cocking bolt shown is on the right in the case of yours and on the left side on the Mohawk (well mine anyway)

As for value I've seen them go from around £180/£190 upwards, same sort of price as my sidelever Mohawk mind that was collected.

Hope this helps
Regards