Couple of options here:
Join Amibay or advertise on here. Remember it’s free, but if on Amibay then you have certain degree of worldwide buyers. With some protection that members are who they say they are.
EBay. Remember you have to pay extortionate end selling fees and V.A.T and put up with total time wasters who will try to whittle you down on price or ask obvious questions which you may already have in your listing. Even to the extent that people are that bored they thinks it’s a Forum and tell you how to sell on the platform and your prices are not correct 🙄
For option 1). Have a look Amibay sales forum for what things have been priced and sold at.
For option 2). Do a search on EBay for prices of what’s being sold. Remember EBay will be more pricier due to end sellers fees. If new on EBay, you won’t get an Immediate payment until roughly 30 days after an item is sold as you will be new. Also watch out for scammers who may buy your stuff and try a return after swapping parts…. also resellers who want things Cheeeeeep! So they can resell them on for a profit 🤬
Good luck 🤞🏻