My anton evo2 now needs a £250 service with new oxygen and carbon monoxide sensors. My first thought was maybe I should just replace it.
Do the service bills get bigger than this?
New analyser will cost you more than the £250, but will save you first year calibration and at least 2 or 3 years parts, so probably will be cheaper long term to buy new.
Your service agent might advise you on the condition and likely future costs. Maybe also consider to trade in your old analyser.