I buy my own direct from the manufacturer (Homehealth, SD Codefree) at £6.50 ish for 50 strips.
I decided never to buy off eBay.
- if they are sold by diabetics who are not using their strips, they are defrauding the NHS
- if they are knockoffs or sourced from China, they have travelled in uncontrolled heat which may affect performance
- they often have short dates
And, as an extra point, I pay for my own prescriptions (not being on D meds) but buying a 50 strip pot of SD Codefree strips works out at less than a prescription charge.
I consider that an all-round-win.