You're paying a premium for the engine rebuild- if you are confident that was done well, then this is a good deal. Lockers wouldn't scare me away- it's fun to pick lines, use momentum and power brake, you can get a lot of places and not tear it up in the process. Although, having lockers is also pretty awesome, but you could add later when you regear for 35's.
He says it's got NTG's, but those pics are BFG's.. whatever. And how is a OBD-II plug a mod? Or did he just leave the cord behind from his scangauge... they all have plugs. Looks like a clean ride though, if you like it then go for it.
more details on the 40 fs?