From what I've found is that most dealers like to buy bog standard examples of the better known brands, I recently bought a used 725 Black after shooting a Miroku for years, did not fit me so ended up trading back in for Miroku MK38 from another dealer and got the same money back as I paid for it...in other words find a dealer who wants what you are selling or he will just have the hassle of moving the gun on in the trade, for which you pay the price.
I recently advertised a MK38 Trap on Guntrader, it was really mint and had done less than 2000 cartridges, came in original box with papers, wrapping the lot. Advertised for £750 and got feed up with calls offering silly amounts for what was almost a brand new gun, ended up selling to a dealer for £700 with zero hassle...Then the blokes who had offered silly amounts called back to say they would have paid that! Had to laugh.
ickeat: 
