Fine Recovery makes a pretty good one, I like it better than the pro line as it has carpet in the upper section under 3/16" punch plate to catch your fines, riffles in lower sluice. With that system most of your gold is in the upper section. Running that as a 3" dredge is going to take a pretty good pump. That is a lot of lift to get up in the top box. I'm not sure if Loui is still making them but if you look hard you can find them near Salem, Or on craigs list. There is another guy here that stocks them used Capitol Prospecting in Salem. If you got lots of coin I would say buy both a good highbanker and a separate 3" dredge in the long run you will be happier. If you get the right ones you can use the same pump for both. There is nothing wrong with saving money by going with used. If you play your cards right you could probably get both for the price of one new. This is the time of year to buy.