Hi Andrew,
I own a '04 plater RX300 SE-L. Love it to bits and has been by far the best vehicle I have ever owned. Like Colin says check the air suspension and I would also add the following checks:
- Rust: Especially on leading edge of the bonnet.
- Alloy wheels: These corrode very quickly so check if they have been refurbished. Also worth checking the condition of the spare wheel too as it lives underneath the car and gets battered by road grime.
- Hand brake cables: These have a tendency to seize.
- Tyres: Check for uneven wear.
- Driver seat: These tend to look worn quickly if not cleaned/treated with leather products.
Hope all goes well and get some pics up if you do decide to buy.
Cheers,
Noman