pricing

Hola, I have some pins to sell I’ve got an idea based from pinside of what they are worth. Is this a good reference point to use? I don’t want to be seeing to rip someone’s eyes out. Also how do you sell your pins on here ? Thanks in advance ?

Anybody know of a UK based source for coin slot pricing plates? I see Marco's have some, but nothing suitable. Surely these things aren't this hard to come by?