As mentioned by @smpratte , the 102/DP-P is way rarer than the other four for some reason. As a Pikachu collector I had been looking for one of these for 1.5 years before I finally found one for 300 USD (sealed). Of course, as is always the case, two more popped up for sale in the two months after that… (I actually bought one of those two and still have it somewhere among my duplicated cards that I have to sell one day…)
I talked about it when I added it to my collection. One reason might be the lower residence count for the city it was released in when we compare it to the other four. Whatever the reason, the 102/DP-P is a lot rarer and harder to find than the other four.
I will quote what I said in my collection thread at the time here:
As mentioned in the quote before. The value is: “Personally I estimate the value of this card around 200-600 USD, which is a very large margin and it’s basically equal to the following: I honestly don’t know; there are too few of these sold to estimate its current value.” This was the case when I received it in April 2017, and this is still the case today.