You can get a Futaba 6ch spread spectrum for $230. It would take you a while to outgrow 6 channels, and this is a great computer radio. Comes with 4 servos for $230. You would have to pay shipping to return what you bought you can get a discount on this radio at Tower, unless what you bought already qualified you for a discount.

I personally wouldn't want an 8 channel radio that wasn't a computer radio (can't mix any channels together, name/store your models, etc.)

You might also be able to find an 8 channel spread spectrum from somewhere else, diff. manufacturer (Airtronics $230/no servos)