Couple things I would add:
- a towel or two
- make sure you have the right adapter / socket to get your wheels off in case of a flat. Standard wheel bolts had a star pattern and some cars came with wheel locks. This should be part of the tool kit that comes with the car, so maker sure the prior owner gives it to you.
'05 Lotus Elise: RS134 Monolites, Nitron Singles, Monoballs, V2 arms, RTD2 brace, Innovative motor mounts, V2 tank, GPan, Larini 8", TransCables, LumosHID, GiroDisc, Ferodo DS2500, etc.
'16 Porsche Cayman GT4