Replacing sensor on yellow jacket vac guage

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cheap Yellow jacket 1 micron or 0.5 micron HVAC gauges

by now most of you guys know im cheap. any of you guys using the LCD digital Yellow jacket gauges for reading vac depth? are they accurate and reliable? There are 2 models im interested in… 69075 (atmos down to 1 micron) and 69070 (1999 micron down to .5 micron greater, resolution but they use same sensor). these can be had for less than 150 shipped in good used condition on ebay sensor: Yellow Jacket 69073, Replacement Sensor for LCD Vacuum Gauge (Pack of 2) for sale online | eBay