The other tip I would give you is to knock up a simple website. One single page will do. But on this site/page you have to give as much detailed information about the aircraft as possible. Potential buyers will want all sorts of information and if you're open and up front about that, will give the impression that you can be trusted. Buyers don't appreciate if they have to leech the information out of you.
At a minimum, the site/page should contain:
- Decent pictures of the aircraft from various angles, plus a cockpit and panel shot.
- All information about the airframe, particularly TT, which ADs/SBs have been complied with, plus any damage history.
- All information about the engine/propellor. TTSN, TSMO, whatever. If you have data on cylinder compression trends, oil analysis trends and such, so much the better.
- All information about avionics. Models, types, whatnot.
- Empty weight/arm and pertinent airframe data like MTOW.
- When the next check is due (50 hours, 100 hours, annual, ...)
- Any logbooks or other formal documents that might be missing.
- Any spares and such that are included in the sale.
- If possible: Any data about expected annual and maginal expenditure associated with the aircraft ownership.
- Any conditions of sale (for instance the conditions regarding the check flight).
- FAQ (Frequently Asked Questions) from potential buyers as you go along.
Then advertise your aircraft in multiple locations, referring to the website in all cases.