That's the original EB4-Limited. You can tell by the milled out chassis, flat side guards and all the egral red crap. You can also tell by how far the front diff housing and bumper sticks out on it. Because of how far it sticks out, the buggy has a shovel nose problem (i.e. a lot of times when you land front wheels first the nose will dig into the ground). The shovel nose problem was the main reason TTR released the EB4-S2.
Other than the shovel nose, I always liked my EB4-Limited. It handled great although the plastic and non-egral metal TTR uses is cheap. The plastic in general is softer than Mugen or Kyosho and so is the metal. TTR diff outdrives wore about 10 times faster than Mugen outdrives. Same with the shock shafts. They will bend easier than Mugen or Kyosho shafts.
As for an engine, if you know how to tune engines there is no reason to get a sport engine. 1/8th scales are much easier to drive then 1/10th scale trucks and in any serious competition on a large track, people will be running fast engines. Get something like an RB S7 or a Novarossi SBK/P5/etc.
Overall, I don't know if I would recommend an the original EB4 because of the shovel nose. Also, if you are buying it just on pictures it would definately be hard to tell how used it is.