Here Wendy: http://www.predecimal.com/forum/forum/58-items-for-sale/
However ... whether here is the best place to sell them is debatable. So far what I've seen has been ... how do I put this? A sort of average assortment of coins put together by a casual collector. Picked from change or from travels as nicer examples.
Now there may be a couple of stars amongst them, but it would take time to sift and see. Maybe you have a coin someone here really, really needs for their collection! Or maybe not .. It depends how much time and effort you want to spend finding out I guess.
It might just be quicker maybe to list a few coins at a time somewhere like eBay. Or visit a dealer? People here might be able to suggest one near to you?
OK, you risk missing out on finding that rarity, but .. well, take a look at this:
This coin had 13 bids on eBay. It's a nice coin in decent condition. And eventually sold for .. £4.20.
Most coins don't sell for a fortune I'm afraid and the time and effort selling them has to be balanced with how much money they might make. Sometimes it's easier to take a bit of cash there and then rather than spend weeks in research and trying to find a buyer for a few quid more.
I hope that doesn't seem mean. It's just we get a lot of people visiting and asking 'how much'. And sadly a lot of the time the answer is .. not a great deal.
Having said that .. if you want to try I suspect the simplest way, rather than dozens of listing is to take some sharp really big photos of each sort of coin. 20 of the better pennies, all the foreign coins, the shillings ... take one photo of the fronts and turn them over (but keep them in the same position so people know which side matches which!!) and do it again.
Put them on photobucket and then post links in the For Sale area. Then people can look through for dates or grades ask for more details of any coins they might be interested in.
Hope that helps.