$50/ea.
Those saddles were pretty basic cheap ones to begin with, and would likely need hundreds in repairs to be truly safe/useful again. They would only be useful for decor or for ornamental purposes at this point.
It’s not just the age that’s a factor. I inherited my current saddle about 10 years ago, and it was made in the late 1980s (so it’s old). It’s a very high quality saddle, it weighs over 40 lbs, and I’d expect to pay $5-6K buy a new equivalent saddle today. Every year I spend a few hundred dollars on repairs to my old saddle in order to keep using it.
The saddle strings were all rotten when I first inherited the saddle. I blew out the old cinch strap almost immediately. The breast collar fell apart after that. Then I snagged the rear cinch on a fence post and had to have a new one made. This last summer I had the stirrup straps replaced because they were thinned from decades of wear and half torn in places. I’ve replaced a lot of the stitching myself, using a hand awl. My saddle looks like a beater car with multiple body panels that all have different paint. But for a high quality saddle I’ll keep repairing it as long as it’s repairable.
I give my saddle two complete teardowns and conditionings a year, and take the hot summer off here in AZ.
Saddles (tack) require a lot of maintenance & repair to keep serviceable. And IMO the cheaper ones tend to fall apart much faster than the high end ones.
A cheaper saddle, once it gets dilapidated, may likely cost more to bring back to life than a replacement cheap saddle.