Here are some great older MCs that are 50k or under.
Lunar Sash | Beautiful sashes and what-not, inspired by the night sky. Currently 41k.
Will-o-the-Wisp | Ghost-like poses, with a shroud, wig, and more in a pale blue colour. Also 41k right now.
Heartbreaker | Has many excellent poses...A skimpy bondage type...binding...attire...enough. Currently 41k.
Kong Sang Scarf | A cool blue scarf. Other poses include a headwrap/mask, and more. Looks kind of shredded (?). 42k.
Gothic Butterfly | One of my personal favourite old MCs. Includes a beautiful purple butterfly hairpiece, obi, mask, wings, and mantle. Currently 50k.
Bani the Bunny | A super cute bunny which you can place around your avatar or cuddle him in your arm. Also has cute clothing pieces based on the bunny. Currently 50k.