Do you just want the mains, or would you be happy with a (full?) set of commons/uncommons as well? If so, buy sealed, enjoy cracking packs, realise you might only get 1 main and a whole lot of crappy R1 and R2 cards, and then reconsider
Back in the day I opened a Premiere booster (English) hoping to get some nice cards, but I had literally NO MAIN (tactical recall x2, yay!). The box was EUR 50 I believe, so not a big loss. However, if you now open a $285 starter box (24 rares) or a $499 booster box (36 rares) there is a good chance you end up with 1-2 mains, some R1 and a lot of R2 cards that cost you $12/13 each but have no real value. You could try to re-sell the rares and a common/uncommon set (requires more that 1 box probably) to recoup your losses
Or you buy a sealed box now, keep it for a few years, and then trade/sell the sealed box and get those mains.
You're probably better off buying a Japanese booster box of ANH for 1-2 of Tantive/Wedge/Chewbacca/Death Star/R2 (who is a R2 rare as well

). Better price per rare, better distribution of playable rares, and there are quite few cool underlying Japanese cards for half slip v-cards that are played in a lot of decks (Imp Justice for instance) so you can show off

Gosse Z. - Seattle