(Please make sure you have the correct Zenny before buying)

PET Upgrades

Capacity Upgrade A: 10,000z (Adds storage space for a second navi to the PET. Free if you get a voucher from the Netpolice.)
Capacity Upgrade B: 20,000z (Adds storage space for a third navi to the PET. Requires Capacity Upgrade A, as the two upgrades interlock.)

NaviParts

HP Memory (Increases HP by 20) - 1000 (+500 per HPMemory bought)
Process Upgrade: 100 Zenny, +100 Zenny for each one you own. (Max 1 per level, IE level 3s can only have a total of 3)
Process Edit: Xz, where X is your current cap.
Custom Expansion (Adds 5 points per item) - 1000z (+500z per item bought)
Speed Upgrade (Add one action per turn): 5000z (+5000z per item bought)
SoulCross Expansion (Adds one SoulCross slot): 3000z (+1000z per item bought)
SubMem (Allows you to carry 1 more of each kind of Subchip): 5000z (+5000z per item bought, 3 max)

Programs

Shield - 3000z
Float Shoes - 2500z
Air Shoes - 4000z
First Barrier - 3000z
Oil Body - 5000z
I'm Fish - 5000z
Battery Mode - 5000z
Jungle Land - 5000z
Rush Support - 15000z
Beat Support - 15000z
Tango Support - 15000z
Bug Stopper - 10000z <One per customer>
Super Armor - 10000z
Attack +1 - 2500z
Rapid +1 - 2500z
Charge +1 - 2500z
HP+50 - 5000z
HP+100 - 10000z
HP+200 - 15000z

Obsolete Refunds

Process Upgrade Level 1: 3000 Each
Process Upgrade Level 2: 5000 Each
Process Upgrade Level 3: 10000 Each