Mobility scooter fully working (Norcot RG30)

Hi all, I would like to ask if anyone have/know about fully working mobility scooters, can be also somewhere where I can get cheap one, my condition worsens and I can't manage much anymore only with my shopping trolley or walker... I would appreciate if you can advise me where's second hand trusted "shops" etc. I'll appreciate any ideas 🌞 Many thanks Salma