Another alternative: Just drive it.
First, GMG is right, an exhaust leak can sound just like a lifter, make sure.
A simple tick on an old engine I would ignore as much as possible. If it turns into a loud clacking at high speed, you should have it done. My 79 Camaro had one of the cams that was quenched in a tank full of sludge and the back 2 lobes were soft and wore out quickly. (After the 12k warranty!!!
). No choice but to do the replacement.
My Wrangler on the other hand has been ticking for maybe 10 years, mostly at start-up when cold. Research indicated the rear lifters get gunked up. Many years of Rislone and diesel oil have pretty much solved the issue.
Summary: If it’s a minor tick on an old car, live with it, you might get another 50k mi. If it goes from tick to loud clack at speed, change the cam and lifters.
Let us know how it turns out. I hate threads that end with us never knowing!