Hard to say about the first one. I'm not very familiar with the early 123's, but I think that one has the problematic and expensive clima relay in it. Also, the odometers are notoriously unreliable in 123's, so take any mileage claims with a huge grain of salt.

The second one was flagged, and is no longer online. If it's a diesel, it would have to be a 190D. I don't know much about the 201 either, but since you already emailed her, you can probably get a chance to check it out. It's pretty easy to spot the old diesels when looking under the hood (as I'm sure you know).