For various reasons, my blood glucose tester today needed five test strips to get a usable reading. I'm on a disability pension and luckily I'm not paying Amazon prices for those strips. On Amazon they are between $47 and $57 per 100. Five strips at those prices would have been between $33 and $39 per fortnight, not a sustainable proposition.
The first three attempts at getting a reading brought up error 02, suggesting a used strip was inserted (hint: they were NOT used strips). The fourth attempt triggered error 08, a contaminated testing port. That is fixed be restarting the tester.
Fortunately I get a substantial NDSS (National Diabetes Support Scheme) subsidy on the test strips and only pay $1.20 per 100.