We have one of these machines at my work, cost us about 10,000 originally. Does 50 disc batches. I provide IT support for 13 library branches and our movie and music checkouts often come back damage or just need a rebuff after it passes through 50 different people.
RTI Eco Master
JFJ (Avoid using on expensive discs)
The JFJ runs 130 on amazon, while the lowest single disc Rti machne is 1600
A Rti can resurface some nasty scratches and make the disc look brand new. The only way you can really tell if its been resurfaced on one of these high end machines is to look for white polish paste residue that gets left behind sometimes or check the center ring. If a disc gets scratched up a lot usually the center ring does too and that does not get polished.
Most mom and pop game stores have the JFJ. I would recommend against using it. I visit a lot of game stores through out the year and I have yet to see a JFJ that leaves a disc looking new. While it can buff out scratches you still get very very light swirl marks. Now this may be because people stretch the pad life and maybe a new set of pads will get it looking new, but I haven't seen it. I'm not trashing the JFJ, it can get non working games working again. But for anything expensive I would find a store with an eco master resurfacer and pay the 3-5 to get it looking new again. Our machine has a very light setting and we can resurface a disc many many times.
I don't know the average limit since the resurfacing machine is used by cataloging. But my friend in that department has said they have discs that have gone through more than a dozen times. That's another concern with the JFJ that multiple rebuffs will come out more and more uneven. I've actually bought a few dollar priced "pricey" games from JFJ owners that couldn't get them working and had them run through our eco master and they worked afterwards.
This is an example of one of the machines, is also just happens to be a sister store to a local store
here.
Damage such as see through pinholes, disc rot, flaking, or deep dents are unable to be resurfaced.