So, I bought out an old shoe repair shop from my neighbor thinking that I could use the machines for my leatherwork - mainly headstalls, spur straps, halters, repairs, etc.  I'd like to be able to do some saddle repairs, maybe make chaps, fix blankets.  Now that I get to researching more, I am wondering if any of the machines will work for my purposes or if I should just sell them all and buy things that are better suited for what I want to do.  I thought a leather sewing machine was a leather sewing machine (face palm). 
Here is what I have: 
Landis 12K 
American Straight Needle Stitcher 
Adler 30-1 
(these I thought I could use) 
Nosecone 12 Auto Soler 
Cinderella 4 1/2 Auto Soler 
Sutton Landis 150 Finishing Line 
(these I'm pretty sure I have no use for) 
Star Co. foot operated riveter 
Rodi 5 in 1 cutter 
American splitter 
(these I don't know if I will want to keep or not) 
I also bought a Consew 227 from an upholstery shop a few years back that I have never done anything with. 
Any advice would be greatly appreciated - to keep or not to keep, pricing, machines that would be better suited for my needs, etc.  TIA