Your best bet is to list items yourself on eBay / poshmark / depop ( any reselling app ) like the other commenters said thrift stores only typically take donations and won’t pay you for donating. However, consignment and second hand shops will but they’re going to take a %.

Honestly though you should consider the estate sale route, it’s getting nice out and people LOVE an estate sale and you won’t even have to lug anything around and you can price the items yourself!!