Hi,
Been on iOffer as well, bought some watches. Actually bought an U-boat as my first rep. Quartz though...
My experience and advice: for high(er) end reps: ioffer is a no-go. Probably all the sellers are dropshippers.
In the end you'll pay at least the same compared buying from the (so-called...) trusted dealers found on the boards.
If you're looking for a certain model for not too many $$$ take your chance but as far as it comes in buying reps ioffer will be defeated by the more commen dealers.
Stan