Have you ever entered a product without a price only to realise when somebody cheekily buys it?

Well with this simple VQMod, the default price field when inputting a new or editing an existing product now becomes a required field that needs a value greater than 0 or it will flag an error.

Just add the file into your VQMod folder and it's installed.

Demo
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admin: http://pks-demo.co.uk/oc-extensions-15/admin

admin username = demo
admin password = demo

Note
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Cannot guarantee it will work with 3rd party themes or modules.