I've been tossing around the idea of picking up an old TLR just for something new to play around with, but I've never shot one and don't know a whole lot about them. Does anyone have any recommendations of cameras that are simple enough for a beginner, yet sturdy and decent enough I'm not going to want to upgrade in a couple months? (For reference, my favourite 35mm to shoot is still my Pentax K1000.) I've been looking on eBay in my price range and seeing some Mamiya C220s and C330s, some Yashica Ds, Yashica-Mat LMs, Lubitel 166s... I also was in a local antique shop the other day and they had a handful of Rolleiflexes (don't remember the model) for about $50 each—it would be my preference to do that, but I'd want to make sure they worked first, and I don't really know what to look for on that type of body. All help appreciated!