I had a look online at WK18TMO, it looks very clean apart from the load bay.
Paint wise it looks like a brand new van, it also had a lapse in MOTs like it was off the road.
Latest MOT 29 Sept 2025 (70650 miles), previous MOT 21 March 2023 (63887 miles). You may want to ask or get a paid service to see if was in an accident or what the reason was for the delay in the MOT.
MOT history is a string of advisories on tyres and brakes which may highlight issues with maintenance. Make sure it has service history without gaps.
The van is showing as Reserved so looks like somebody has put a deposit down.
It’s about 20 min’s from my home but I’ve never been there before.