I have been collecting  mens primarily white briefs "tighty whites" for twenty plus years.  The hobby  has  evolved and changed in many respects from what interests me about the taboo clothing item regarding how I determine thier value. 

While the market value is the only method considered to create a monetary valuation of the inventory, there are two different value systems present at the same time.  Market Value (MV)and Non-Tangible Value (NTV),  the MV  is relatively simple to quantify and understand, the NTV is a much more difficult quantification of value. Any pair considered collectable, would be subjected to the individual collector's personal preferance.  Thus, each collector will assign thier own given value regardless of what the seller might consider the value to be. 

One of the most profound changes has been in the how and what of peoples attitudes toward the subject of collecting underwear, as I understand it and the newly introduced people.  Generally (I say generally because you don't know what everyone is thinking) the majority of people are enthusiastically positive and interested, often asking relevant questions and supportive.  In the beginning I didn't tell anyone but close friends about the collection, but as the collection has grown, so has my confidence and willingness to share the subject with strangers.

When it comes to the subject of what defines a vintage pair of underwear, I know I am going to have other collectors disagree with me, but here goes.  Any time a manufacturer discontinues a design component in any way it qualifies the previous model as "Vintage".   Unless a term to describe to describe the opposing meaning of "contemporary", then vintage should apply.  Not trying to redefine terminology but in the soft goods (clothing), the exact age is often impossible  to determine.  

I will continue to expand this guide text and attempt to make it more useful and interesting to all that stop by.