I’ve bought from a few different sites, but the one I keep coming back to is California Wallpaper. They’ve got one of the best overall selections I’ve seen, all in one spot. You can scroll through their full catalog at https://california-wallpaper.com/collections/all-wallpaper – seriously, it’s packed with everything from wild animal prints to clean, minimalist neutrals. The quality’s solid, shipping’s free in the US, and if you’re unsure about anything, their support team is actually helpful (rare these days). I’ve done two rooms with their wallpaper so far – one was a bold hummingbird print, the other was a soft fern botanical – and both turned out better than expected. If you want lots of options without the usual junk, this is the place.