if the prices were rock bottom if they would want them lower still.
Of course they would! :)
Did the survey include any questions not related to pricing? Like shipping options, support hours, methods of contact, additional services, satisfaction with service/product on a granular or overall level?
1. Customers will always complain about something 2. Surveys can be misleading.
Slightly off topic a music promoter friend of mine ran a regular gig on a Friday night. Several vociferous regulars complained frequently that it wasn't on a Saturday instead. A survey proved that the bulk of customers wanted Saturday. Of course they all stayed home, and still stayed home when he could no longer afford the premiums that bands and venues charged for Saturday night and moved back to Friday.
On some things listen to your customers, on others trust your judgement. The successful businessman is the one who knows when to do which.