I have built lots of models on commission for people , mostly as farewell gifts for commanders and soldiers that they have served with. Military pople love to see the vehicle they served on in miniature. I personally don't think e-bay is the way top sell built models, most people charge too much, and you really don't know the quality of the kit. I don't really advertise, just word of mouth.
Here is what I use as a pricing guide. Basic, OOTB kit build is twice the kit price. Added extras or conversions go up from there. I charge $5 per figure added as well for basic plastic figure, resin figure is again caost of figure x 2. I include a wooden base with groundwork for display. Diorama type displays are more as well.
I don't agree with the so called "Masters" who charge rediculous amounts for their works, as shown in the above post. In the end, it is only a plastic model, there are many more out there that others can build as well.
Gino P. Quintiliani - Field Artillery - The KING of BATTLE!!!
Check out my Gallery: https://app.photobucket.com/u/HeavyArty
"People sleep peaceably in their beds at night only because rough men stand ready to do violence on their behalf." -- George Orwell