My original toe links have almost 180k miles on them. So for a couple hundred bucks it will be good for about the same more. Lower control arms for another $500 should give me another 150k or more. Sway bar links were replaced at 80K with greasable Moog version for about $35 each,,, and are still going strong.
A person will put into their vehicle... what the vehicle is worth to them. Most suspension parts aren't necessarily scarce,,, just hard to find... and may not be cheap. Many Jag parts will fit,,, and the aftermarket is slowly producing what is no longer supplied by the OEM.
Might want to check your rear lower contol arms... especially the rear bushing on each one. I drilled mine and installed grease fittings. That helped for a while,,, but 2 oil changes ago I noticed that when I greased the left rear,,, the contol arm moved. That explained the waggle I was feeling at the time in the backend of my LS.
Hope this helps