It's dangerous to put amounts here but a full working Berzerk board-set should be worth a reasonable amount of cash.
Not sure about a loose Frenzy ZPU.....I think that's 25 Euro's (I'll take it

)
No, seriously don't know what Frenzy ZPU is worth.
As always it's the "find the mad-man that pays the correct amount" as we say in Holland

Sadly (for you) Superully, Muerto and I already have a nice collection of Berzerk spare boards....not all working, but still....