alan, a little tip that might help you sell your equipment for a price nearer to what you want.
I window shop here alot and have bought the occasional thing and i reckon you are much better off listing it on ebay with photos etc and then posting the ebay link on here.
Can't complain at people wanting a bargain but generally (and not just this item) people on here who appear to be interested just don't to want to pay the money or anything close to what you have in mind.
Once it's listed on ebay you will weed out the serious buyers and won't have to go through the hassle of replying to everyone that they are not offering what you want.
Like i say, you can't complain about people offering silly money in the hope of getting a bargain but somehow this isn't the place to sell anything which has a high value. Just look through the posts advertising items that are worth alot of money and you'll see the same silly offers.
Good luck.