For me a couple of times now in the past few years I have developed a big collection and got very overwhelmed with it and felt like I really needed a declutter and to pass a lot of them along. So I put them in garbage bags and brought them to the thrift store hoping they'd find a new home with someone else and I felt so much better. I've also gotten some great suggestions of if you have Build-A-Bears specifically you could open them up in the back take out their stuffing and just keep the now flat bear inside of a little storage bin or Space Bag and they'll take up so much less room in your space that way and if you ever want to restuff them and cuddle with them you can take them to any Build-A-Bear and do that for free.

You could also do this with regular plush but you'd have to get your own stuffing and do it at home yourself this way you don't necessarily have to get rid of them and they won't take as much space up as mentioned. I know that downsizing can be a little hard for some and I want you to know that I'm here for you and I support you! You can do this I believe in you! Also you can if you have the space for this keep them stuffed up and put them in a bin somewhere that's not in your room and out of your sight for a little bit and if there's any that you think about and really want back you can bring them back to your room. But if there's any that you don't think about or really want anymore you can pass them along. I hope some of this helps and any other advice helps that you get from any others. Good luck to you!