then resell them to buy the newer key cap set from Unicomp.
Do I have to unplug both layers of the keys? There are two layers for every key, which was a good way to change key cap, I suppose.
Keys are easily removed, separated, and cleaned.
You may not be able to get the same $30 that the established stores charge, and many people consider the old IBM caps to be superior to Unicomp's.
Unicomp has a dazzling array of color choices, etc, but if you want more than a small handful of "accent" keys they get very pricey in a hurry.
clickykeyboards sells old reclaimed stock.
Buying 3 keyboards might be a good way to get 2 that you really like, perhaps one to mod and decorate, and one to keep stock.
Sell off the 3rd at a low price, perhaps missing caps, to recoup some of your costs.