As Yorksman said, if you are using it to test different foods, then the fact that it reads high won't make any difference. It will tell you if a food spikes you too much.
If you are on meds that you could hypo on such as gliclazide then you should get strips prescribed by your GP to make sure you are safe driving.
Your choice is if you don't get strips prescribed is to:
1. Buy your strips for your chosen meter at a chemist and pay what they are asking (if you buy from Boots online, they have a form to fill in as you don't have to pay VAT on them)
2. Some meter manufacturers sell strips directly
3. Get a meter that uses cheaper strips
4. Buy your chosen strips from Ebay - they are usually cheaper from there, but you are likely to get ones that were issued to someone else on prescription (some people aren't very good at taking chemist labels off them). They could be sold by someone (Type 1) who orders more strips than they use because they don't test enough or have changed their meter and still have strips left. They could also be sold by a lady who had Gestational diabetes which has now gone since she had the baby.
Someone mentioned the Supercheck2 meter as a cheaper alternative on here the other day
http://www.supercheck2.co.uk/ but I couldn't find the strips for sale easily.