When I first got started, I was doing them for $775 with AllParts bodies and necks and generic import tuners. Then I started using bodies from USACG and Hipshot tuners, which made the price $875. That was about 6 months ago.
Now I've dropped AllParts completely. I now offer USACG necks and bodies only. AllParts are great for the money, but I wanted to offer a more premium product. The USACG necks are simply unbeatable. Also, I now include full shielding on each bass. Because of these factors, along with increased demand, it made sense to set the price at $1100. Which is still very low for a custom bass.
I really don't see myself changing the pricing at this point. I'm done upgrading the components and features. And I'm a firm believer that a good, custom workhorse bass should be affordable.