A few days ago I released a site to help find cards.
https://monster-finder-d7d0d.web.app/
And now I have added a new feature to find rent prices for cards, with the possibility to filter by min level and max daily price. Also, if the card you're looking for is favorited, the values will be saved for when you come back.
Maybe in the future I'll add the possibility to rent directly, instead of needing to go the Splinterlands or Peakmonster site, but I still need to study how to do it.
Hope the new feature is helpful.
Cheers