You could buy clothingrentals.com or clothesrental.com for $1700 BIN right now and I think they sound better than clothesrentals (but that is just my personal taste, others may disagree).
The 2 big sales you mention are both from many years ago and neither are in use, although one is owned by Rick Schwartz.
I personally think the GD valuation may be pretty spot on with this one, however there is does seem to be a number of businesses starting to offer designer clothing rentals and if they perform well and others enter the market, the value of this domain should increase nicely.