PWizard, I was cheering you on for dealing with a rude commenter, but now I'm...actually experiencing the exact same issue he's describing.
When viewing a storefront, all crafting and trading items appear just fine, but all resources appear at -1 and cannot be purchased. I've attached a screenshot so you can see what's happening.
Options I've been using are listed below.
Numpad 1: God Mode
Numpad 2: Toxicity Hazard Protection
Numpad 3: Life Support Energy
Numpad 4: Unlimited Tool/Gun
Numpad 5: No Tool/Gun Overheat
Numpad 6: Unlimited Stamina
Numpad 7: Unlimited Jetpack
Numpad 0: No Reload
Numpad /: Unlimited Ammo
F3: No Ship Weapon Overheat
F4: Super Speed
I can confirm that when you have the option Numpad *: "Max Resources" enabled it will cause exactly what you are describing in the store front. Simply toggling that option off restores the storefront to normal operation. I have tested this with the most current 1.07 patch using the current trainer.
The Easy Crafting option doubles as an Easy Refueling option.
Just activate it and you can refuel all your stuff for free