The DL 737-200s were built circa 1985 and had the latest upgrades such as interior, etc. which matched the level of the 757 and 737-300, which were new at the time. They have much less time on them than the average UA 737-200, for example, and the cabins are alot less dingy looking. I always liked them on mainline and thought DL did a good job outfitting them. This was in the days of the two-class ships, and I'm sure DLExpress isn't as nice, but they have a few years on 'em before they can be considered junk jets.