On the Work Table Today

I have been running low on sunpainted shirts.  Spud 1 sells them all at a show in November.  I haven't been taking them to shows.  I end up trying to make them in October when the leaves are tough and drying.  Not such a great plan.  Now that I have a bunch of trimming to do in the yard, I have gotten the shirts out and am working on getting 'normal' sizes for November and baby shirts to re-stock the brick and mortar shop that sells them.  If I get ahead, I'll put some in the etsy shop. 

It isn't impossible to find plain onsies in garage sales and re-sale shops but it is almost impossible to find plain white t-shirts in adult sizes to upcycle.  I might have to break down and buy some new ones.  That will be a challenge for me. 

Ephemera Anyone?

A lady I know is downsizing.  She has a couple boxes of treasures: pages of recipes, clippings, travel spots, craft ideas, house ideas, holiday stuff.  The graphics are pretty cool.  She would like to have it go to good homes.  We are in the process of trying to package it to sell in the shop.  All you paper people out there....

1.  Do you buy ephemera?
2.  What attracts you to a lot?
3.  Postage?  It is easiest for use to put it in priority envelopes or boxes.  Does that make it cost prohibitive? 
4.  Do you like to get a mix of stuff or do you want a package of Christmas or big ads or what?
5.  If you are searching for paper treasures, what search terms are you most likely to use?  
6.  Speaking of cost....  ??? 

Any suggestions or advice would be greatly appreciated.