Having had problems with one Repro SST, I would definitely prefer the DT--and they're likely to bring more money simply because there aren't as many of them. 28" barrels . . . I like them on most guns, especially smallbores, but I don't like what they call "M/F" on those barrels in 28ga. 020/040 is M/F in a 12ga, not a 28ga--and I've measured several sets of Repro 28" 28ga barrels, and that nonsense seems to be standard.
That being said, I agree that's a very good price for a 28ga Repro in that condition, regardless of configuration.