I have a similar deal with myself - I'm allowed to buy a deck only after I filled my quota on paid readings... but we'd need that money for other things, too.
After Nina put up the super-beautiful and exactly-my-cup-of-stargazer-tea Arcana of Astrology, I broke down. In the end, she didn't want to sell so I headed headlessly over to the shop and bought it directly from the artist.
What a beauty.
So I broke down. Now actually I started thinking again about my desired stargazing sub-collection: Celestial, Quantum, Constellations, Cosmos, Ptolemaic Constellations oracle, nice Astronomical Playing Cards they sell in the UK... oh yeah...
Wrestling with my demons here, DOWN you demons!!! DOWN!!! ARGH....