Can i ask what your going to replace it with?, as £240 doest buy a lot. You would then (whether you like it or not) need to add more money.
That being the case, surely its better to spend the minimum amount to fix the clocks. Therefore keeping the vehicle you know so well & love
having had it 9 years. I have this dilema every time i see something i like

for sale

. But including buying converting to lpg & servicing.
My 3.2 still owes me nothing (i base my vehicles depreciation on £100/ month)...... eg if i spend £1600 i expect 16 months out of it.
Fix the clock & keep it, or sell it to another member, who will appreciate the care you have taken of it.