I'm not seeing a lot of pre-buy business. Most of my inspections come after the rig has been purchased and the new owner needs to figure out what to fix or how to operate various systems before their first trip. I had one last month for a TT that wasn't going to move from the spot in the local trailer park. The buyer had no idea how to operate anything. the roof was shot and I called around to find someone who would go to the park to fix it.
When I started doing inspections, I figured the lending companies would want a condition inspection done before financing, or that the third party warranty companies would want an initial inspection. I haven't had any of these. I have yet to do a complete pre-purchase inspection. BTW I charge way less than $1300.
I'm guessing the decision to buy is not based on whether it's a good decision but more on emotional, I like the interior colors type thing.