Best source for Pre-owned Ladies Rolex - Yachtmaster?

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Our stellar TRF sellers et al seem to focus on mens watches - with the occassional ladies watch for sale. I know some sellers with AD connections could get a BNIB, but that may be more than I want to spend.

I am looking at the TT Ladies Yachtmaster - SS + Gold, white dial / black markers. My wife actually expresses some interest in this model after seeing one at an AD.

I personally favor the SS OPs, and the more traditional SS + gold models, but she gravitated toward the aforementioned lady Yachtmaster.

Any ideas on the best place to look for one of these - pre-owned?

I believe MSRP is about $8K ...I have seen some for sale on line at random sites I know nothing about for anywhere from $4.5K to $6K.

Thanks!