Found a great site call Pro-Jerseys.com, with the pretty much the largest selection of vintage NBA shorts you will find in one spot. The NBA is mainly featured on this site (where else can you find a Pooh Richardson or Malik Sealy throwback?), but also offers an interesting selection of Yankees, Mariners, Red Sox and Mets jerseys, although they are all of current players.
Mitchell & Ness is also doing a great job of bringing back the Atlanta Hawks look of the 70's. Known for putting players' nicknames on the back of the jerseys (M & N previously made the Pete Maravich "Pistol" jersey available), Walt "Bells" Bellamy can be found for sale in the Hardwood Classics section of NBA.com. Hawks of the 70's wool caps and track jackets are on the Mitchell & Ness website as well.
And lastly, the Braves (in)famous mascot, Chief Noc-A-Homa is back, via Fitted Hawaii. Angels, A's and Padres retro designs from them can also be seen here.
That's all for now, I have an early 90's Angels hat on the way, so I'll make sure to get a picture of it up when it arrives.
And why not part with an Inspirational Quote?
"If I have a choice whether to do the show or throw a straight pass, and we're going to get the basket either way, I'm going to do the show."
-All-Time career NCAA scoring leader and NBA Hall of Famer Pete "Pistol" Maravich