I was looking to buy a marker buoy for trolling, mostly for crappie. Anyone outa there use marker buoys when trolling. I've never used one but it seems that lots of times there will be a spot where I'll get many hits: either 2 rods go down or I'll troll back over the spot and catch another fish. I've looked in catalogs and haven't seen any under $40. A lot of times the water depth is fiarly consistent so I could get by with a milk jug with 10 to 15 feet of line and some kind of weight. The $40 ones let the weight drop until it feels bottom and stops letting line out. It seems like you could make the same thing. Anybody have any ideas?