Of course the value of Paulson chips can go down. Not by a cent or two, but perhaps losing most of their value. The foremost thing to keep in mind is how thin the market is. There are not many buyers nor many sellers. It doesn't take much to move that kind of market. Really only a couple of dedicated buyers can move markets in a big way.
Sets from limited sources are more prone to sharp price swings vs sets from larger venues or giant group buys.
The general economic conditions matter. When people are worried about rent, food, clothing etc. They sell no matter the price. And often buyers can't be found. Boom times work the otherway. The buyer wants the chips, price be damned and even then sellers can't be found.
Popularity changes. Once upon a time, coin in center bud jones chips were red hot. Not so much any more. Remember the faux clay nation? not many people do. boat chips were blazing hot, now just hot. But by next year? who knows.
I guess there is a "floor" of sorts. You buy a Paulson set for well under a buck and likely you will always be able to sell them for under a buck, if not more.
No assurances that you can get your money back. And always be mindful that shipping is a constant friction. That is money you likely shouldn't expect to recover.
Buy them if you like them. Plan to use them. But getting your money back is no sure thing.
DrStrange