Key thing for me is you bought new off Ebay, not used from Grandson FredI’ll throw my 2cents in—-i have been on warfarin for 9 yrs. I got so frustrated with doing monthly testing that my Coumadin clinic ordered. I purchased my own Coaguchek xs on eBay so I could test weekly. It was new in the box and about a third of the price that Roche wanted. I had no problems with it—worked great. I used it for 4-5 years. When I became eligible for Medicare I got a new Coaguchek and strips from Roche at no cost (my supplement pays what Medicare doesn’t).
You got your new one at 1/3 the cost, and Allere gives the meters away for the price of the strips, that gives you an idea of how cheap the meters really are.