Prices shouldn't be raised for one, actually, two reasons:
- Cloaking time is very short, it's already below 4 minutes.
- Cloak itself is a very expensive tool (basic MK1 costs like a cruiser).
TL;DR Weren't cloaks nerfed too much already?
Also, you are excluding people who don't trade much and raising price to make it a moneysink (for a few) makes these players thinking there's no point in owning such a cloak.
You are throwing child with a bathtub.
My idea in regard to moneysinks: If people have too much credits, why not to make some charity then?