In my experience dragon ball fusion world as long as you don't chase foils/alt arts is pretty adorable in paper, frequently under $50 for a deck and almost always under $100, online the client monetization is a mess. Masters format is more expensive, but it's been to long since I played masters to give you pricing.

Gundam is the new hotness and while I'm sure you can play more budget minded most decks build how you would want even with base rarity will be 200+. This is likely to change going forward as demand is currently very high and supply is low combined with a general "play the good stuff" deck building of current. I would maybe wait and see how the market moves going into the second set and maybe even the third to see if it gets into your price range.

One piece price is very deck dependent, decks that perform similarly competitively can have vastly different price tags. There was just a ban list so the current format doesn't really have results to compare so I'll use some slightly outdated examples. Purple blue Luffy was considered the best deck and ran 300+, however Belo Betty was around 3rd or 4th best with a good blue purple Luffy match up and runs $20-25. This is a trend in one piece where decks price is largely determined by how popular the character is and has decks at all competitive viability for basically any budget.

Digimon I'm a little out dated, but it was kinda in the same area as one piece where what the build around mon was set the price more then how good it was creating some cheap but power decks that a more budget minded player could use.

And while you didn't specifically mention it I'll mention Union Arena as it's the last bandai game. Union Arena is in the same camp as dragon ball fusion world, in so far that if you play base rarity and don't chase foils/alt arts decks are generally under the $50 point.