Let me just state that Rich is personable, friendly, and the quality of his albums, both vinyl and sleeve, is well-above most to all other stores in the West Coast.
Walking through Wax Trax is akin to touring through a friend's MASSIVE personal collection of Lp's and singles, make sure you take the time to do it right! You will not be rushed or pressured while perusing, yet you will have each choice go through inspection for a quoted price. Lastly, you get what you pay for, it's quality not crap in there, so gird yourself to pay for quality!
Rich is also a wealth of music history and stories, it is definitely worth checking out this little green building on Decatur. His associate (Jeremy? I forgot your name, sir) is equally as helpful, and if you are looking for a specific album, release, mix, etc., he will seek and find for you. Both of them, and the collection of wax make this store a "must come back" experience for my Vegas visits.