Sorry, Nepitty, I have no experience of selling any valuable/antique/much-loved items. However, over a couple of years we regularly receive advertising from two companies that travel around the country to various centres and who buy gold, silver, pewter, etc. Then recently they informed of a date and location near to our town and made a point of informing how the price of gold was currently very high.
I decided to finally let go of some gold items, lots broken, which belonged to late Mum, MiL, me etc., Things which were never worn, outdated, never looked at but I was interested in whether they had any actual value.
We agreed (DH and I) that if the set-up seemed odd or the price offered not worth the visit, that we would leave. We were just curious to see how this might work. Outside the hotel, I imagined a queue of people waiting and so my H was 'volunteered' to go and investigate. I sat in the car and he was in the hotel for over an hour.
He came back to the car, finally. It was lunchtime and there had been no queue! He said that the guy was really nice but that everything had taken forever to test, evaluate, weigh, document, prepare paperwork for. The guy explained that although he had papers to prove where he worked, how he worked etc., if he was ever stopped by the Douanes/Customs or the Police, he would always have to account for every item, where he had bought it, how much he had paid for it, etc., His life, he said was all about paperwork. (Well, it is France!)
Make me laugh, I said. You had a lengthy chat, lots of 'admin', coffee etc., but did he actually buy anything? My DH simply handed me a cheque for £1200 (in Euros). I almost fell off the seat!
Seriously, this was just old stuff that was never looked at, just clutter, really. And we never imagined that it would be worth very much. You can imagine how shocked and pleased we were. I think we must have smiled for the entire day.