I have a older saddle that I have recently been repairing and the billets on the left side just both ripped. I was wondering if it is worth repairing them? How would you fix them? The rest of the saddle is in great condition.
Contact someone who works with leather professionally. You can bring it in and ask for an estimate, and decide from there if the value of the saddle is worth the restoration cost. If it's a cheap saddle I wouldn't even bother with it, but if it is a nice older model then it may be worth it!
If you've been repairing it, have the webs gone or the straps just detached?
The former is a fairly complicated repair to ensure safety, but stitching the straps back on isn't too hard. With a lot of older saddles the webs aren't that long, so to re-attached girth straps you have to undo the head stitching to get at them, but that's not too difficult to re-do if you have a long enough awl.