Decided to sell something on a local Facebook group for £10. Agreed to sell it to someone and have now discovered it’s worth £500+. My own fault of course but would I be unreasonable to go back on my agreement to sell it for £10 or should I honour it.
For info, we could do with the money but we’re not actually skint and the item concerned had been in the shed for 8 years so not like we’d expected to earn money from it.