Things along the lines of I know what I have it was my granddads and he told me that's what it was and every one else has no idea or the who effin asked for your opinion or when you ask how did they come up with a value they either say cause it's old and hard to come by which in most cases isn't or I saw one listed on eBay it didn't sell but kinda almost looks as crap as mine so must be worth that much too. Plenty of other reply's that aren't pg but we won't get into those . Most will take what you have to say onboard and amend there ad but quite a few are happy to try and potentially trick unsuspecting people or are just (insert swear word)