One of my buddies upgraded his ca and is selling his 327-1 for ~$200 it is reading sensor error so its going to at least need an 02 sensor and probably a CO sensor as well. Other than that it is in good condition and comes with ir printer, 6 rolls of paper, hard case and probe gun. I am currently using a Bacharach tech 60 and am not to find of it. Is this a good deal? Does the 327 have to be sent to testo for sensor change? How much will it cost to have the sensors replaced? Is the 327-1 a good meter, better than the fyrite tech 60 I'm currently using?