Some of the best leather cleaners/conditioners out there are likely available of your local feed store (for live stock). Yellow book will be able to find something for you. There is a variety of things out there and your feed store will likely have them all for cheaper than you can find commercial car/couch cleaners. There are leather cleaners, conditioners, restorers etc. Some of your options are Lexol, Saddle Soap etc. Some research will help you find out what you need for your leather but the best method no matter what you choose is to do it all in moderation as leather products tend to be oily and over use will leave the leather oily as well. There are small name brands and big name brands (leather new). The most expensive brands will likely be from saddle makers themselves (Stubben) which the feed store probably wont have. But you can get a 1/2 gallon (128 fl oz) of leather new for about $20 on ebay.