Hey Mickey!
I'm Daryoush, on the marvellous Guru team! :)
The best app for this in my opinion is the Customer Pricing app by Bold. It allows you to setup different customer levels (i.e. "Gold", "Silver", "Platinum") and they can each have their own specific pricing. In addition to this, take a look into the Locksmith app as well as these other apps:
- Member Pricing
- Recurring Memberships
- Ultimate Special Offers
I hope this helps, have a lovely weekend!
Cheers,
Daryoush