I recently carried out a test flight with a syndicate. All such flights in the group are carried out by the Group Secretary, on behalf of the seller. I was P1, in the left hand seat and flew the entire flight. I paid for the fuel and landing, with the "dry" cost met by the seller. Seemed a very reasonable arrangement to all concerned.
The flight had the combined purpose of me checking out the aircraft and the group checking out me! (passed muster on both accounts
).
TallGuy