I find a lot of people are "smoking" when it comes to the resale prices of 2 doors. Rims and ugly headlights don't make it worth 7K more than it really is. There are some owners who still believe the 2 door Tahoe/Yukon/Blazer is rare enough that they can tact on a nice premium no matter the mileage or condition.
The truth is, to ask $12K you'd better be offering a last year Yukon GT, or Tahoe sport with all options, in mint condition, with under 50K miles. And even in our current economic state it would be hard to sell at that price.