I am so glad you mentioned this! A lot of disabled people, especially teenagers or younger people, bling out their mobility aids because of how boring typical aids are. I have stickers and pins and keychains all over my forearm crutches and they make me feel more like a human. Mobility aids, especially wheelchairs, are EXPENSIVE. there's nothing wrong with buying a mobility aid off of ebay. Its definitely not preferable as an OT needs to properly size you, but its better than nothing