Hi glenbar,
First af all if your chinmey is sound then it wont need to be lined, I have only had to install a flue liner in maybe a handfull of installations in twenty odd years.
You may need to get it swept first, that costs about �45.
The installation price will depend upon what type of fire your are buying & if you have a standard builders opening or not. My charges for a fire installation start from around �85 upto aprox �150. Depending on how much preperation work and the type of fire involved. Hope this helps you out . Gasman.