Well, Carlyle said once that Rumple was “about 300 years old.” They’ve cited similar numbers before but they haven’t been real precise. Bae said he’d be “a couple hundred years old” if he hadn’t gone to other lands. I’ve estimated that Rumple was in his mid-thirties when Bae was born, putting him at close to 50 when he became the Dark One. (The mid-thirties went with other evidence but it neatly put him close to the actor’s actual age.) Even so, 19th century London (even early Dickensian, which is…almost plausible) seems a little late timelinewise for Bae to pop through. But if it’s actually another world, then that problem is solved and it works okay when you consider Victor’s world (which also has similarities to particular places/times in ours, yet Victor is probably around the same age as, or slightly older than, Regina).
Keeper of Belle's Gold magic, sand dollar, cloaks, purple FTL outfit, spell scroll, library key, copy of Romeo and Juliet, and cry-muffling pillow, Rumple's doll, overcoat, and strength, and The Timeline. My spreadsheet: https://drive.google.com/file/d/0B6r8CySCCWd9R0RUNm4xR3RhMEU/view?usp=sharing