A dead SE, but don't gut a dead SE/30 as those are much more valuable and can usually be simply repaired. They will generally cost more anyway, so you'll prefer to go cheaper anyway for such a project.
Suffice it to say the value of a non-functional 128K is going to be less than a functional one. However, yours seems to require only a minor chip replacement. A very small soldering job indeed. It is highly unlikely a bad chip will show any visible signs that it has gone bad (unfortunately). Even components that are prone to show damage are hard to spot. Your 128K seems to also be suffering from a voltage problem and is exhibiting signs that it is under stress and one or more components on the analogue board are getting ready to die. However, a simple voltage adjustment may be all that's necessary to restore it to health to take the stress off the parts that are old and weak and near failing. You'll need an inexpensive multi-meter for that and follow Tom Lee's instructions.
Donor boards turn up all the time, so keep your eyes out, learn to do some simple soldering and make the minor repairs that will restore your 128K. The fact that there may be components on your analogue board that are near end-of-life means that you will most likely need to replace a few other components in near future if you restore it to service and make use of it. If you follow Tom's instructions and proactively replace the known problems before they fail you will save yourself much grief and potential additional related part failures. If you don't see yourself working on it at this level, you should probably clean it up as best you can and sell it, listing its known faults. Given the simple nature of these repairs, you will most likely still get a good price from a buyer who is capable of making the repairs and selling it for a profit. It would be a shame to return it to its storage box for another 10 years risking further deterioration and potential damage.
I disagree with JDW that someone who might pay $200 or more would fail to take care of the 128K as well as your grandparents or you would. For most Mac collectors, that kind of money inspires some care, especially if they intend to restore it and re-sell it for more.