I would never buy a replica. Well... Maybe if I had a watch in sight that is very-very expensive, and I wouldn't be absolutely sure how it wears, or how I'd like it on my wrist... Maybe, just maybe then I'd get a replica (but only a good one), to "test-drive" the watch I'm considering. When I got the real thing, I'd of course destroy the watch, since selling a replica is illegal here.
I actually sort of already did that, not with a replica, but with a homage. I got an Invicta 8926C (Sub Date homage) to see whether I like the infamous Submariner design on me, whether I like or hate the date cyclops, whether the size (40mm) is too small for me, etc. I only wore it a few times, I drew my conclusion, and sold the Invicta for the same $$ I bought it for.
As for wearing a replica when you're afraid of damaging your watch... I don't understand that: there're so many nice sports watches in the sub-$500 range, why cannot one wear such a cheaper alternative when the watch is potentially subjected to harsh treatment? Or better yet: just wear nothing, like me for such ocassions
